--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/de/mpg/mpiwg/itgroup/digilib/icons/greyskin/baselib.js	Mon Jan 03 09:11:25 2011 +0100
@@ -0,0 +1,981 @@
+/* Copyright (C) 2003-2006 IT-Group MPIWG, WTWG Uni Bern and others
+
+This program is free software; you can redistribute it and/or
+modify it under the terms of the GNU General Public License
+as published by the Free Software Foundation; either version 2
+of the License, or (at your option) any later version.
+ 
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+ 
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA
+ 
+Authors: 
+  Christian Luginbuehl, 01.05.2003 (first version)
+  DW 24.03.2004 (Changed for digiLib in Zope)
+  Robert Casties, 2.11.2004 (almost complete rewrite)
+  Martin Raspe, 12.12.2005 (changes for Digilib NG)
+  Robert Casties, 3.9.2009
+*/
+
+// was: function base_init() {
+baseLibVersion = "2.011";
+browserType = getBrowserType();
+
+sliders = {};
+activeSlider = null;
+
+function getInt(n) {
+    // returns always an integer
+    n = parseInt(n);
+    return (isNaN(n)) ? 0 : n;
+}
+
+function defined(x) {
+    // returns if x is defined
+    return (typeof arguments[0] != "undefined");
+}
+
+function cropFloat(x) {
+    // auxiliary function to crop senseless precision
+    return parseInt(10000 * x) / 10000;
+}
+
+function getBrowserType() {
+    // browser sniffer
+    var bt = Object();
+    bt.doDHTML = false;
+    bt.versIE = 0;
+
+    if ((! document.cssonly && document.layers) || document.all || document.getElementById) {
+        var vers = navigator.appVersion.split('MSIE ');
+        vers = vers[vers.length - 1];
+        bt.versIE = getInt(vers);
+        bt.isIE = navigator.userAgent.indexOf('MSIE') >= 0;
+        bt.isMac = navigator.platform.indexOf('Mac') >= 0;
+        bt.isWin = navigator.platform.indexOf('Win') >= 0;
+        bt.isN4 = (navigator.userAgent.indexOf('Mozilla/4.') >= 0) && ! bt.isIE;
+        bt.isIEWin = bt.versIE > 0 && bt.isWin;
+        if (navigator.appVersion.indexOf('MSIE') < 0 || ! bt.isMac || bt.versIE >= 5) {
+            bt.doDHTML = true;
+            bt.isOpera = navigator.userAgent.indexOf(' Opera ') >= 0;
+            bt.isKonq = navigator.userAgent.indexOf(' Konqueror') >= 0;
+        }
+    }
+    return bt;
+}
+
+// fixes for javascript < 1.2
+if (! Array.prototype.push) {
+    Array.prototype.push = function(val) {
+        this[this.length] = val;
+        return this.length;
+    }
+    Array.prototype.pop = function() {
+        var val = this[this.length-1];
+        this.length -= 1;
+        return val;
+    }
+}
+
+
+/* **********************************************
+ *     geometry classes
+ * ******************************************** */
+
+/*
+ * Size class
+ */
+function Size(w, h) {
+    this.width = parseFloat(w);
+    this.height = parseFloat(h);
+    return this;
+}
+Size.prototype.toString = function() {
+    return this.width + "x" + this.height;
+}
+Size.prototype.equals = function(other) {
+	return (this.width == other.width
+        &&  this.height == other.height)
+    }
+
+/*
+ * Position class
+ */
+function Position(x, y) {
+    this.x = parseFloat(x);
+    this.y = parseFloat(y);
+    return this;
+}
+Position.prototype.toString = function() {
+    return this.x + "," + this.y;
+}
+Position.prototype.equals = function(other) {
+	return (this.x == other.x
+        &&  this.y == other.y)
+}
+/*
+ * Rectangle class
+ */
+function Rectangle(x, y, w, h) {
+	if (typeof x == "object") {
+		// assume x and y are Position
+		this.x = x.x;
+		this.y = x.y;
+		this.width = y.x - x.x;
+		this.height = y.y - x.y;
+		return this;
+	}
+    this.x = parseFloat(x);
+    this.y = parseFloat(y);
+    this.width = parseFloat(w);
+    this.height = parseFloat(h);
+    return this;
+}
+Rectangle.prototype.toString = function() {
+    return this.width+"x"+this.height+"@"+this.x+","+this.y;
+}
+Rectangle.prototype.copy = function() {
+    // returns a copy of this Rectangle
+    return new Rectangle(this.x, this.y, this.width, this.height);
+}
+Rectangle.prototype.getPosition = function() {
+    // returns the position of this Rectangle
+    return new Position(this.x, this.y);
+}
+Rectangle.prototype.getPt1 = Rectangle.prototype.getPosition;
+// returns the upper left corner position
+
+Rectangle.prototype.getPt2 = function() {
+    // returns the lower right corner position of this Rectangle
+    return new Position(this.x + this.width, this.y + this.height);
+}
+Rectangle.prototype.setPt1 = function(pos) {
+    // sets the upper left corner to position pos
+    this.x = pos.x;
+    this.y = pos.y;
+    return this;
+}
+Rectangle.prototype.setPt2 = function(pos) {
+    // sets the lower right corner to position pos
+    this.width = pos.x - this.x;
+    this.height = pos.y - this.y;
+    return this;
+}
+Rectangle.prototype.getCenter = function() {
+    // returns the center position of this Rectangle
+    return new Position(this.x + this.width / 2, this.y + this.height / 2);
+}
+Rectangle.prototype.setCenter = function(pos) {
+    // moves this Rectangle's center to position pos
+    this.x = pos.x - this.width / 2;
+    this.y = pos.y - this.height / 2;
+    return this;
+}
+Rectangle.prototype.getSize = function() {
+    // returns the size of this Rectangle
+    return new Size(this.width, this.height);
+}
+Rectangle.prototype.equals = function(other) {
+    // equal props
+    return (this.getPosition().equals(other.getPosition())
+        &&  this.getSize().equals(other.getSize())
+        );
+}
+Rectangle.prototype.getArea = function() {
+    // returns the area of this Rectangle
+    return (this.width * this.height);
+}
+Rectangle.prototype.normalize = function() {
+    // eliminates negative width and height
+    var p = this.getPt2();
+    this.x = Math.min(this.x, p.x);
+    this.y = Math.min(this.y, p.y);
+    this.width = Math.abs(this.width);
+    this.height = Math.abs(this.height);
+    return this;
+}
+Rectangle.prototype.containsPosition = function(pos) {
+    // returns if Position "pos" lies inside of this rectangle
+    return ((pos.x >= this.x)
+        && (pos.y >= this.y)
+    && (pos.x <= this.x + this.width)
+    && (pos.y <= this.y + this.width)
+    );
+}
+Rectangle.prototype.containsRect = function(rect) {
+    // returns if rectangle "rect" is contained in this rectangle
+    return (this.containsPosition(rect.getPt1()) 
+        && this.containsPosition(rect.getPt2()));
+}
+Rectangle.prototype.stayInside = function(rect) {
+    // changes this rectangle's x/y values so it stays inside of rectangle rect
+    // keeping the proportions
+    if (this.x < rect.x) this.x = rect.x;
+    if (this.y < rect.y) this.y = rect.y;
+    if (this.x + this.width > rect.x + rect.width) 
+        this.x = rect.x + rect.width - this.width;
+    if (this.y + this.height > rect.y + rect.height)
+        this.y = rect.y + rect.height - this.height;
+    return this;
+}
+Rectangle.prototype.clipTo = function(rect) {
+    // clips this rectangle so it stays inside of rectangle rect
+    var p1 = rect.getPt1();
+    var p2 = rect.getPt2();
+    var this2 = this.getPt2();
+    this.setPt1(new Position(Math.max(this.x, p1.x), Math.max(this.y, p1.y)));
+    this.setPt2(new Position(Math.min(this2.x, p2.x), Math.min(this2.y, p2.y)));
+    return this;
+}
+Rectangle.prototype.intersect = function(rect) {
+    // returns the intersection of the given Rectangle and this one
+    // FIX ME: not really, it should return null if there is no overlap 
+    var sec = rect.copy();
+    if (sec.x < this.x) {
+        sec.width = sec.width - (this.x - sec.x);
+        sec.x = this.x;
+    }
+    if (sec.y < this.y) {
+        sec.height = sec.height - (this.y - sec.y);
+        sec.y = this.y;
+    }
+    if (sec.x + sec.width > this.x + this.width) {
+        sec.width = (this.x + this.width) - sec.x;
+    }
+    if (sec.y + sec.height > this.y + this.height) {
+        sec.height = (this.y + this.height) - sec.y;
+    }
+    return sec;
+}
+Rectangle.prototype.fit = function(rect) {
+    // returns a Rectangle that fits into this one (by moving first)
+    var sec = rect.copy();
+    sec.x = Math.max(sec.x, this.x);
+    sec.y = Math.max(sec.y, this.x);
+    if (sec.x + sec.width > this.x + this.width) {
+        sec.x = this.x + this.width - sec.width;
+    }
+    if (sec.y + sec.height > this.y + this.height) {
+        sec.y = this.y + this.height - sec.height;
+    }
+    return sec.intersect(this);
+}
+
+/*
+ * Transform class
+ *
+ * defines a class of affine transformations
+ */
+function Transform() {
+    this.m00 = 1.0;
+    this.m01 = 0.0;
+    this.m02 = 0.0;
+    this.m10 = 0.0;
+    this.m11 = 1.0;
+    this.m12 = 0.0;
+    this.m20 = 0.0;
+    this.m21 = 0.0;
+    this.m22 = 1.0;
+    return this;
+}
+Transform.prototype.concat = function(traf) {
+    // add Transform traf to this Transform
+    for (var i = 0; i < 3; i++) {
+        for (var j = 0; j < 3; j++) {
+            var c = 0.0;
+            for (var k = 0; k < 3; k++) {
+                c += traf["m"+i+k] * this["m"+k+j];
+            }
+            this["m"+i+j] = c;
+        }
+    }
+    return this;
+}
+Transform.prototype.transform = function(rect) {
+    // returns transformed Rectangle or Position with this Transform applied
+    var x = this.m00 * rect.x + this.m01 * rect.y + this.m02;
+    var y = this.m10 * rect.x + this.m11 * rect.y + this.m12;
+    if (rect.width) {
+        // transform the other corner points
+        var pt2 = rect.getPt2();
+        var x2 = this.m00 * pt2.x + this.m01 * pt2.y + this.m02;
+        var y2 = this.m10 * pt2.x + this.m11 * pt2.y + this.m12;
+        var width = x2 - x;
+        var height = y2 - y;
+        return new Rectangle(x, y, width, height);
+    }
+    return new Position(x, y);
+}
+Transform.prototype.invtransform = function(rect) {
+    // returns transformed Rectangle or Position with the inverse of this Transform applied
+    var det = this.m00 * this.m11 - this.m01 * this.m10;
+    var x = (this.m11 * rect.x - this.m01 * rect.y - this.m11 * this.m02 + this.m01 * this.m12) / det;
+    var y = (- this.m10 * rect.x + this.m00 * rect.y + this.m10 * this.m02 - this.m00 * this.m12) / det;
+    if (rect.width) {
+        /* transforming width and height like points seems to be wrong 
+        var width = (this.m11 * rect.width - this.m01 * rect.height - this.m11 * this.m02 + this.m01 * this.m12) / det;
+        var height = (- this.m10 * rect.width + this.m00 * rect.height + this.m10 * this.m02 - this.m00 * this.m12) / det;
+        */
+        // transform the other corner points
+        var pt2 = rect.getPt2();
+        var x2 = (this.m11 * pt2.x - this.m01 * pt2.y - this.m11 * this.m02 + this.m01 * this.m12) / det;
+        var y2 = (- this.m10 * pt2.x + this.m00 * pt2.y + this.m10 * this.m02 - this.m00 * this.m12) / det;
+        var width = x2 - x;
+        var height = y2 - y;
+        return new Rectangle(x, y, width, height);
+    }
+    return new Position(x, y);
+}
+function getRotation(angle, pos) {
+    // returns a Transform that is a rotation by angle degrees around [pos.x, pos.y]
+    var traf = new Transform();
+    if (angle != 0) {
+        var t = 2.0 * Math.PI * parseFloat(angle) / 360.0;
+        traf.m00 = Math.cos(t);
+        traf.m01 = - Math.sin(t);
+        traf.m10 = Math.sin(t);
+        traf.m11 = Math.cos(t);
+        traf.m02 = pos.x - pos.x * Math.cos(t) + pos.y * Math.sin(t);
+        traf.m12 = pos.y - pos.x * Math.sin(t) - pos.y * Math.cos(t);
+    }
+    return traf;
+}
+Transform.prototype.getRotation = getRotation;
+function getTranslation(pos) {
+    // returns a Transform that is a translation by [pos.x, pos,y]
+    var traf = new Transform();
+    traf.m02 = pos.x;
+    traf.m12 = pos.y;
+    return traf;
+}
+Transform.prototype.getTranslation = getTranslation;
+function getScale(size) {
+    // returns a Transform that is a scale by [size.width, size.height]
+    var traf = new Transform();
+    traf.m00 = size.width;
+    traf.m11 = size.height;
+    return traf;
+}
+Transform.prototype.getScale = getScale;
+
+
+/*
+ *  parameters class
+ */
+
+function Parameters() {
+	this.params = new Object();
+	this.PARAM_ALL = 65535;
+	return this;
+}
+Parameters.prototype.define = function(name, defaultValue, detail) {
+    // create a new parameter with a name and a default value
+    if (!this.params[name]) this.params[name] = new Object();
+    this.params[name].defaultValue = defaultValue;
+    this.params[name].hasValue = false;
+    this.params[name].value = defaultValue;
+    this.params[name].detail = detail;
+    return this.params[name];
+}
+Parameters.prototype.reset = function(name) {
+    // resets the given parameter to its default value
+    if (!this.params[name]) {
+    		alert("Could not reset non-existing parameter '" + name + "'");
+		return false;
+    }
+    this.params[name].hasValue = false;
+    this.params[name].value = this.params[name].defaultValue;
+    return this.params[name];
+}
+Parameters.prototype.resetAll = function() {
+    // resets all parameters to their default values
+    for (var p in this.params) {
+    		this.reset(p);
+    	}
+    return true;
+}
+Parameters.prototype.remove = function(name) {
+    if (!defined(this.params[name])) return false;
+    delete this.params[name];
+    return true;
+}
+Parameters.prototype.get = function(name) {
+    // returns the named parameter value or its default value
+    if (!defined(this.params[name])) return null;
+    return this.params[name].hasValue ? this.params[name].value : this.params[name].defaultValue;
+}
+Parameters.prototype.set = function(name, value, relative) {
+    // sets parameter value (relative values with +/- if relative=true)
+    if (!defined(this.params[name])) return null;
+    var p = this.params[name];
+    if (relative && value.slice) {
+    		// value is a string -- check if it starts with +/-
+        var sign = value.slice(0, 1);
+        if (sign == '+') {
+            p.value = parseFloat(p.value) + parseFloat(value.slice(1));
+        } else if (sign == '-') {
+            p.value = parseFloat(p.value) - parseFloat(value.slice(1));
+        } else {
+            p.value = value;
+        }
+    } else {
+    		p.value = value;
+    	}
+    p.hasValue = true;
+    return p.value;
+}
+Parameters.prototype.isSet = function(name) {
+    // returns if the parameter's value has been set
+    if (!defined(this.params[name])) return null;
+    return this.params[name].hasValue;
+}
+Parameters.prototype.getAll = function(detail) {
+    // returns a string of all parameters in query format
+    if (!detail) detail = this.PARAM_ALL;
+    var pa = new Array();
+    for (p in this.params) {
+        if (((this.params[p].detail & detail) > 0)
+        && (this.params[p].hasValue)) {
+            var val = this.params[p].value;
+            if (val != "") {
+                pa.push(p + "=" + val);
+            }
+        }
+    }
+    return pa.join("&");
+}
+Parameters.prototype.parse = function(query) {
+    // gets parameter values from query format string
+    var pa = query.split("&");
+    for (var i = 0; i < pa.length; i++) {
+        var keyval = pa[i].split("=");
+        if (keyval.length == 2) {
+            this.set(keyval[0], keyval[1]);
+        }
+    }
+}
+
+/*
+ * Flags class
+ *
+ * Flags are (hash-) collections of unique strings.
+ */
+function Flags() {
+    this.flags = new Object();
+    return this;
+}
+Flags.prototype.define = function(name, detail) {
+    // create a new flag with a name and detail level
+    this.flags[name] = new Object();
+    this.flags[name].set = false;
+    this.flags[name].detail = detail;
+    return this.flags[name];
+}
+Flags.prototype.get = function(name) {
+	return (this.flags[name]) ? this.flags[name].set : false;
+}
+Flags.prototype.set = function(name, value) {
+	if (!defined(value)) value = true;
+	if (!this.flags[name]) this.flags[name] = new Object;
+	this.flags[name].set = value;
+}
+Flags.prototype.reset = function(name) {
+	if (!this.flags[name]) this.flags[name] = new Object;
+	this.flags[name].set = false;
+}
+Flags.prototype.toggle = function(name) {
+	if (!this.flags[name]) this.flags[name] = new Object;
+	this.flags[name].set = !this.flags[name].set;
+}
+Flags.prototype.resetAll = function() {
+	for (var f in this.flags) {
+		this.flags[f].set = false;
+	}
+}
+Flags.prototype.parse = function(query, sep) {
+    // sets the flags from the string query
+    if (!sep) sep = ",";
+    var fa = query.split(sep);
+    for (var i = 0; i < fa.length ; i++) {
+        var f = fa[i];
+        if (f != "") {
+            this.set(f);
+        }
+    }
+}
+Flags.prototype.getAll = function(detail, sep) {
+    // returns a string of all flags in query format
+    if (!detail) detail = 255;
+    if (!sep) sep = ",";
+    var fa = new Array();
+    for (f in this.flags) {
+        if (this.flags[f].set) {
+        		// if the flag has a detail level it must match
+        		// otherwise we assume detail=128
+        		if (this.flags[f].detail) {
+	        		if ((this.flags[f].detail & detail) > 0) {
+	        			fa.push(f);
+	        		}
+	        	} else {
+        		  	if ((detail & 128) > 0) {
+        				fa.push(f);
+        			}
+        		}
+        	}
+    }
+    return fa.join(sep);
+}
+
+
+/* **********************************************
+ *     HTML/DOM routines
+ * ******************************************** */
+
+function getElement(tagid, quiet) {
+    // returns the element object with the id tagid
+    var e;
+    if (document.getElementById) {
+        e = document.getElementById(tagid);
+    } else if (document.all) {
+        alert("document.all!");
+        e = document.all[tagid];
+    } else if (document.layers) {
+        e = document.layers[tagid];
+    } 
+    if (e) {
+        return e;
+    } else {
+        if (! quiet) {
+            alert("unable to find element: "+tagid);
+        }
+        return null;
+    }
+}
+
+function getElementPosition(elem) {
+    // returns a Position with the position of the element
+    var x = 0;
+    var y = 0;
+    if (defined(elem.offsetLeft)) {
+        var e = elem;
+        while (e) {
+            if (browserType.isIE) {
+                if (browserType.isMac) {
+                    if (e.offsetParent.tagName == "BODY") {
+                        // IE for Mac extraspecial
+                        x += e.clientLeft;
+                        y += e.clientTop;
+                        break;
+                    }
+                } else {
+                    if ((e.tagName != "TABLE") && (e.tagName != "BODY")) {
+                        x += e.clientLeft;
+                        y += e.clientTop;
+                    }
+                }
+            }
+            x += e.offsetLeft;
+            y += e.offsetTop;
+            e = e.offsetParent;
+        }
+    } else if (defined(elem.x)) {
+        // use .x for other (which?)
+        x = elem.x;
+        y = elem.y;
+    } else if (defined(elem.pageX)) {
+        // use pageX for N4
+        x = elem.pageX;
+        y = elem.pageY;
+    } else {
+        alert("unable to get position of " + elem + " (id:" + elem.id + ")");
+    }
+    return new Position(getInt(x), getInt(y));
+}
+
+function getElementSize(elem) {
+    // returns a Rectangle with the size of the element
+    var width = 0;
+    var height = 0;
+    if (defined(elem.offsetWidth)) {
+        width = elem.offsetWidth;
+        height = elem.offsetHeight;
+    } else if (defined(elem.width)) {
+        width = elem.width;
+        height = elem.height;
+    } else if (defined(elem.clip.width)) {
+        width = elem.clip.width;
+        height = elem.clip.height;
+    } else {
+        alert("unable to get size of " + elem + " (id:" + elem.id + ")");
+    }
+    return new Size(getInt(width), getInt(height));
+}
+
+function getElementRect(elem) {
+    // returns a Rectangle with the size and position of the element
+    // FIX ME: what about borders?
+    var pos = getElementPosition(elem);
+    var size = getElementSize(elem);
+    return new Rectangle(pos.x, pos.y, size.width, size.height);
+}
+
+function moveElement(elem, rect) {
+    // moves and sizes the element
+    if (elem.style) {
+        if (defined(rect.x)) {
+            elem.style.left = Math.round(rect.x) + "px";
+            elem.style.top = Math.round(rect.y) + "px";
+        }
+        if (defined(rect.width)) {
+            elem.style.width = Math.round(rect.width) + "px";
+            elem.style.height = Math.round(rect.height) + "px";
+        }
+    } else if (document.layers) {
+        if (defined(rect.x)) {
+            elem.pageX = getInt(rect.x);
+            elem.pageY = getInt(rect.y);
+        }
+        if (defined(rect.width)) {
+            elem.clip.width = getInt(rect.width);
+            elem.clip.height = getInt(rect.height);
+        }
+    } else {
+        alert("moveElement(): element has no style or layer property!");
+        return false;
+    }
+    return true;
+}
+
+function showElement(elem, show) {
+    // shows or hides the element
+    if (elem.style)
+        elem.style.visibility = show ? "visible" : "hidden";
+    else if (defined(elem.visibility))
+        elem.visibility = show ? "show" : "hide";
+    else
+        alert("showElement(): element has no style or layer property!");
+    return true;
+}
+
+function evtPosition(evt) {
+    // returns the on-screen Position of the Event 
+    var x;
+    var y;
+    evt = (evt) ? evt : window.event;
+    if (!evt) {
+        alert("no event found! " + evt);
+        return;
+        }
+    if (defined(evt.pageX)) {
+        x = parseInt(evt.pageX);
+        y = parseInt(evt.pageY);
+    } else if (defined(evt.clientX)) {
+        x = parseInt(document.body.scrollLeft + evt.clientX);
+        y = parseInt(document.body.scrollTop  + evt.clientY);
+    } else {
+        alert("evtPosition(): don't know how to deal with " + evt);
+        }
+    return new Position(x, y);
+}
+
+function registerEvent(type, elem, handler) {
+    // register the given event handler on the indicated element
+    if (elem.addEventListener) {
+        elem.addEventListener(type, handler, false);    // bubble
+        }
+    else if (elem.attachEvent) {
+        elem.attachEvent("on" + type, handler);
+        }
+    else if (elem.captureEvents) {
+        if (Event) { 
+            t = type.toUpperCase();
+            elem.captureEvents(Event[t]);
+            elem[ "on" + type ] = handler;
+            }
+        }
+    else {
+        alert("Could not register event of type " + type);
+        return false;
+        }
+    return true;
+    }
+    
+function unregisterEvent(type, elem, handler) {
+    // unregister the given event handler from the indicated element
+    if (elem.removeEventListener) {
+        elem.removeEventListener(type, handler, false);
+            }
+    else if (elem.detachEvent) {
+        elem.detachEvent("on" + type, handler);
+        }
+    else if (elem.releaseEvents) {
+        if (Event) { 
+            t = type.toUpperCase();
+            elem.releaseEvents(Event[t]);
+            elem[ "on" + type ] = null;
+            }
+        }
+    else {
+        alert("Could not register event of type " + type);
+        return false;
+        }
+    return true;
+}
+
+function registerEventById(type, id, handler) {
+    registerEvent(type, getElement(id), handler);
+    }
+
+function unregisterEventById(type, id, handler) {
+    unregisterEvent(type, getElement(id), handler);
+    }
+
+function stopEvent(e) {
+    if (!e) var e = window.event;
+    e.cancelBubble = true;
+    if (e.stopPropagation) e.stopPropagation();
+    return false;
+}
+
+function getEventSrc(e) {
+    if (e.target) return e.target;
+    if (e.srcElement) return e.srcElement;
+}
+
+// old registerXXYY API for compatibility
+function registerMouseDown(elem, handler) {
+    return registerEvent("mousedown", elem, handler);
+}
+function unregisterMouseDown(elem, handler) {
+    return unregisterEvent("mousedown", elem, handler);
+}
+function registerMouseMove(elem, handler) {
+    return registerEvent("mousemove", elem, handler);
+}
+function unregisterMouseMove(elem, handler) {
+    return unregisterEvent("mousemove", elem, handler);
+}
+function registerKeyDown(handler) {
+    return registerEvent("keypress", elem, handler);
+}
+
+
+function getWinSize() {
+    // returns a Size with the current window size (mostly from www.quirksmode.org)
+    var wsize = new Size(100, 100);
+    if (defined(self.innerHeight))  {
+        // all except Explorer
+        if ((self.innerWidth == 0)||(self.innerHeight == 0)) {
+            // Safari 1.2 (and other) bug
+            if (parent) {
+                wsize.height = parent.innerHeight;
+                wsize.width = parent.innerWidth;
+            }
+        } else {
+            wsize.width = self.innerWidth;
+            wsize.height = self.innerHeight;
+        }
+    } else if (document.documentElement && document.documentElement.clientHeight) {
+        // Explorer 6 Strict Mode
+        wsize.width = document.documentElement.clientWidth;
+        wsize.height = document.documentElement.clientHeight;
+    } else if (document.body) {
+        // other Explorers
+        wsize.width = document.body.clientWidth;
+        wsize.height = document.body.clientHeight;
+    }
+    return wsize;
+}
+
+function getWinRect() {
+    var size = getWinSize();
+    return new Rectangle(0, 0, size.width, size.height);
+}
+    
+function openWin(url, name, params) {
+    // open browser window
+    var ow = window.open(url, name, params);
+    ow.focus();
+}
+
+/* **********************************************
+ *     cookie class
+ * ******************************************** */
+
+function Cookie() {
+    return this.read();
+}
+
+Cookie.prototype.read = function() {
+    var s = document.cookie;
+    var lines = s.split("; ");  // semicolon and space for all browsers?
+    for (var i in lines) {
+        var line = lines[i];
+        var sep = line.indexOf("=");
+        if (sep != -1) this.add(
+            line.substr(0, sep),
+            line.substr(sep + 1)
+            );
+        }
+	return this;
+}
+
+Cookie.prototype.store = function() {
+    var lines = new Array();
+    for (var i in this) {
+        var item = this[i];
+        if (typeof(item) == typeof(lines)) // Array
+            lines.push(i + "=" + item.join(","));
+        else if (typeof(item) != "function") // single item
+            lines.push(i + "=" + item);
+        }
+    // var s = lines.join(";")
+	for (line in lines) document.cookie = lines[line];
+    return this;
+	}
+
+Cookie.prototype.add = function(key, value) {
+    value = value.toString();
+    if (value.indexOf(",") == -1) 
+            this[key] = value;  // single value
+        else
+            this[key] = value.split(",");   // list of values
+    return this[key];
+    }
+
+Cookie.prototype.get = function(key) {
+    return this[key];
+    }
+
+Cookie.prototype.addbool = function(key, value) {
+    this[key] = Boolean(value).toString();
+    return this[key];
+    }
+
+Cookie.prototype.getbool = function(key) {
+    var val = this[key];
+    return (val > "") && (val != "0") && (val != "false");
+    }
+
+Cookie.prototype.remove = function(key) {
+    delete this[key];
+    }
+
+function Slider(id, valMin, valMax, valStart, stepSize, onChange) {
+    // a (horizontal) slider widget
+    this.id = id;
+    this.elem   = getElement(id);
+    this.slider = getElement(id + "-slider");   // the slider handle
+    this.input  = getElement(id + "-input", 1); // optional input field
+    this.bar    = getElement(id + "-bar");      // the slider bar 
+    this.barRect = getElementRect(this.bar);
+    this.sliderRect = getElementRect(this.slider);
+    this.xMin = this.barRect.x;
+    this.xMax = this.xMin + this.barRect.width; 
+    this.xDiff = this.xMax - this.xMin; 
+    this.Y = this.barRect.getCenter().y;        // middle axis of bar 
+    this.valMin = valMin;
+    this.valMax = valMax;
+    this.valDiff = Math.abs(valMax - valMin);
+    this.valStart = valStart;
+    this.value = valStart;
+    this.stepSize = stepSize;
+    this.valueLabel  = getElement(id + "-value", 1);
+    this.valMinLabel = getElement(id + "-valmin", 1);
+    this.valMaxLabel = getElement(id + "-valmax", 1);
+    this.onChange = onChange ? onChange : function() {};
+    this.update();
+    this.activate();
+    sliders[id + '-slider'] = this; // make a handle to the object
+    return this;
+    }
+
+Slider.prototype.show = function(show) {
+    showElement(this.elem, show);
+    this.activate();
+    }
+    
+Slider.prototype.activate = function() {
+    this.setupEvents();
+    }
+
+Slider.prototype.deactivate = function() {
+    unregisterEvent("mousedown", this.slider, this.onDragStart);
+    }
+
+Slider.prototype.reset = function() {
+    this.setValue(this.startVal);
+    }
+
+Slider.prototype.setValue = function(newVal) {
+    // sets slider to new value and updates
+    this.value = newVal;
+    this.update();
+    }
+
+Slider.prototype.calcValue = function() {
+    // calculates value from slider position
+    var xSlider = this.sliderRect.getCenter().x - this.xMin;
+    this.value = xSlider * this.valDiff / this.xDiff;
+    return this.value;
+    }
+
+Slider.prototype.update = function() {
+    // updates slider position to new value
+    var xSlider = this.value * this.xDiff / this.valDiff;
+    moveElement(this.slider, this.sliderRect.setCenter(
+        new Position(xSlider + this.xMin, this.Y)));
+    var strVal = this.value.toString();
+    if (this.valueLabel) this.valueLabel.innerHTML = strVal;
+    if (this.input) this.input.value = strVal;
+    }
+
+Slider.prototype.setupEvents = function() {
+    // installs all event callbacks
+    registerEvent("mousedown", this.slider, this.onDragStart);
+    }
+
+Slider.prototype.onDragStart = function(evt) {
+    var slider = sliders[this.id];
+    activeSlider = slider;
+    unregisterEvent("mousedown", slider.slider, slider.onDragStart);
+    registerEvent("mousemove", document, slider.onDrag);
+    registerEvent("mouseup",   document, slider.onDragEnd);
+    slider.startPos = evtPosition(evt);
+    slider.startX = slider.sliderRect.getCenter().x;
+    return stopEvent(evt);
+    }
+
+Slider.prototype.onDrag = function(evt) {
+    var slider = activeSlider;
+    var pos = evtPosition(evt);
+    var currX = slider.slider
+    var newX = pos.x - slider.startPos + slider.startX;
+    if (newX < slider.xMin) newX = slider.xMin;
+    if (newX > slider.xMax) newX = slider.xMax;
+    moveElement(slider.slider, slider.sliderRect.setCenter(
+        new Position(newX, slider.Y)));
+    return stopEvent(evt);
+    }
+
+Slider.prototype.onDragEnd = function(evt) {
+    var slider = activeSlider;
+    unregisterEvent("mousemove", document, slider.onDrag);
+    unregisterEvent("mouseup",   document, slider.onDragEnd);
+    slider.onChange(slider.calcValue());
+    activeSlider = null;
+    return stopEvent(evt);
+    }
+
+Slider.prototype.onInputChange = function() {
+    var slider = activeSlider;
+    slider.onChange(s.value);
+    }
+
+// :tabSize=4:indentSize=4:noTabs=true:
+