--- a/gis_gui/blocks/map.js	Tue Nov 23 17:23:10 2010 +0100
+++ b/gis_gui/blocks/map.js	Tue Nov 23 19:02:58 2010 +0100
@@ -59,31 +59,52 @@
     return this.params;
 };
 
+guiBlocks.Block.prototype.deleteMapLayer = function (idx) {
+    // remove layer from this map
+    var layers = this.params.map_layers;
+    layers.splice(idx,1);
+    // update indexes
+    for (var i = 0; i < layers.length; i++) {
+        layers[i].idx = i;
+    }
+    return this.params;
+};
+
 guiBlocks.Block.prototype.showMapParams = function (elem, params) {
     // create html with layer parameters from params
-    var i, layers, tmpl, lp, idx;
+    var i, layers, $tmpl, lp, idx;
+    var block = this;
     if (elem == null) {
         elem = this.element;
     }
     if (params == null) {
         params = this.params;
     }
-    $(elem).find(".map_name").val(params.name);
+    var $elem = $(elem);
+    $elem.find(".map_name").val(params.name);
     layers = params.map_layers;
     // remove old info
     $(elem).find(".map_layer_table .layer_info").remove();
     // write new info
     if (layers.length > 0) {
-        tmpl = $(elem).find(".layer_info_tmpl").tmpl(layers);
-        $(elem).find(".map_layer_header").after(tmpl);
+        $tmpl = $elem.find(".layer_info_tmpl").tmpl(layers);
+        $elem.find(".map_layer_header").after($tmpl);
         // arm edit and delete buttons
         for (i = 0; i < layers.length; ++i) {
             lp = layers[i].layer;
             idx = layers[i].idx;
             console.debug("showmapparams lp=", lp, " idx=", idx);
-            tmpl.find(".layer_edit_"+idx).click(function () {
+            $tmpl.find(".layer_edit_"+idx).click(function () {
+                var param = lp;
                 console.debug("open layer ",idx);
-                blocks.addLayerBlock("blocks/layer.html?table="+escape(lp.table),"layer", lp);
+                blocks.addLayerBlock("blocks/layer.html?table="+escape(lp.table),"layer", param);
+            });
+            $tmpl.find(".layer_delete_"+idx).click(function () {
+                var layerIdx = idx;
+                console.debug("del layer ",layerIdx);
+                params = block.deleteMapLayer(layerIdx);
+                block.showMapParams(elem, params);
+                block.updateMap(elem, params);
             });
         }
     }
@@ -142,7 +163,7 @@
             paramstr += "&connect_line="+params.connect_line;
         }
         var layerurl = "../db/RESTdb/db/public/" + escape(params.table) + "?" + paramstr;
-        jQuery.get(layerurl, function(data, textStatus, XMLHttpRequest) {
+        jQuery.get(layerurl, function (data, textStatus, XMLHttpRequest) {
             // function after load kml url finished
             console.debug("kml url loaded! this=", this, " data=", data, " ("+typeof(data)+")");
             if (typeof(data) == "string") {

--- a/gis_gui/lib/blocks.js	Tue Nov 23 17:23:10 2010 +0100
+++ b/gis_gui/lib/blocks.js	Tue Nov 23 19:02:58 2010 +0100
@@ -14,6 +14,18 @@
     return (typeof arguments[0] !== "undefined");
 }
 
+function randomString() {
+    var chars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXTZabcdefghiklmnopqrstuvwxyz";
+    var string_length = 8;
+    var randomstring = '';
+    for (var i=0; i<string_length; i++) {
+        var rnum = Math.floor(Math.random() * chars.length);
+        randomstring += chars.substring(rnum,rnum+1);
+    }
+    return randomstring;
+}
+
+
 /* 
  *  guiBlocks base
  */
@@ -52,8 +64,8 @@
     	$(this).appendTo(container);
     	// chain done function
         if (typeof(whenDone) == "function") {
-        	// chain whenDone
-        	whenDone();
+        	// chain whenDone (should we add parameters?)
+        	whenDone.apply(this);
         } else {
         	// default after load function
         	$(this).fadeIn();
@@ -116,7 +128,7 @@
 
 // collapse the block so that only its titlebar is visible
 function foldBlock(segment){
-    if (! segment) {
+    if (segment == null) {
         return;
     }
 	if(segment.hasClass("folded")){
@@ -157,16 +169,3 @@
       });
 
 }
-
-
-function randomString() {
-	var chars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXTZabcdefghiklmnopqrstuvwxyz";
-	var string_length = 8;
-	var randomstring = '';
-	for (var i=0; i<string_length; i++) {
-		var rnum = Math.floor(Math.random() * chars.length);
-		randomstring += chars.substring(rnum,rnum+1);
-	}
-	return randomstring;
-}
-