Index: trunk/kernel/admin_templates/incs/grid.js
===================================================================
diff -u -r5006 -r5022
--- trunk/kernel/admin_templates/incs/grid.js	(.../grid.js)	(revision 5006)
+++ trunk/kernel/admin_templates/incs/grid.js	(.../grid.js)	(revision 5022)
@@ -1,3 +1,32 @@
+var $GridManager = new GridManager();
+
+function GridManager () {
+	this.Grids = Grids; // get all from global variable, in future replace all references to it with $GridManager.Grids
+	this.AlternativeGrids = new Array();
+}
+
+GridManager.prototype.AddAlternativeGrid = function ($source_grid, $destination_grid, $reciprocal) 
+{
+	if (typeof(this.AlternativeGrids[$source_grid]) == 'undefined') {
+		// create array if it is first alternative grid to this one
+		this.AlternativeGrids[$source_grid] = new Array();
+	}
+	this.AlternativeGrids[$source_grid].push($destination_grid);
+	
+	if ($reciprocal) {
+		this.AddAlternativeGrid($destination_grid, $source_grid);
+	}
+}
+
+GridManager.prototype.ClearAlternativeGridsSelection = function ($source_prefix)
+{
+	var $i = 0;
+	while ($i < this.AlternativeGrids[$source_prefix].length) {
+		this.Grids[ this.AlternativeGrids[$source_prefix][$i] ].ClearSelection();
+		$i++;
+	}
+}
+
 function GridItem(grid, an_element, cb, item_id, class_on, class_off)
 {
 	this.Grid = grid;
@@ -141,8 +170,9 @@
 }
 
 
-function Grid(class_on, class_off, dbl_click, toolbar)
+function Grid(prefix, class_on, class_off, dbl_click, toolbar)
 {
+	this.prefix = prefix;
 	this.class_on = class_on;
 	this.class_off = class_off;
 	this.Items = new Array();
@@ -297,17 +327,13 @@
 
 Grid.prototype.ClearAlternativeGridsSelection = function (called_from)
 {
-	for (var i in this.AlternativeGrids) {
-		this.AlternativeGrids[i].ClearSelection(null, called_from + ' -> Grid.ClearAlternativeGridsSelection');
-	}
+	$GridManager.ClearAlternativeGridsSelection(this.prefix);
 }
 
 Grid.prototype.AddAlternativeGrid = function (alt_grid, reciprocal) 
 {
-	this.AlternativeGrids.push(alt_grid);
-	if (typeof(reciprocal) != 'undefined' && reciprocal) {
-		alt_grid.AddAlternativeGrid(this);
-	}
+	var $dst_prefix = typeof('alt_grid') == 'string' ? alt_grid : alt_grid.prefix;
+	$GridManager.AddAlternativeGrid(this.prefix, $dst_prefix, reciprocal);
 }
 
 Grid.prototype.FirstSelected = function ()