function loadCats(grID)
		{
			makeAjaxRequest("includes/Index_GetCat.aspx?gr="+grID,"fillCatList(XML_OBJECT)");
		}

		function fillCatList(xmlObj)
		{
			var catCombo = document.getElementById("cat_list");
			for (var i=catCombo.options.length;i>0;i--)
				catCombo.options[i] = null;
				
			var catCombo = document.getElementById("cat_list");
			var categories = xmlObj.selectNodes("//Categories/Category");
			for (var i=0;i<categories.length;i++)
			{
				catCombo.options[catCombo.options.length] = new Option(getSingleNode(getNode(categories,i),"Name"),getSingleNode(getNode(categories,i),"ID"));
			}
		}
		
		function validate()
		{
			/*var sCat = document.getElementById("cat_list").options.selectedIndex;
			if (sCat == 0)
			{
				alert("Please choose a category");
				return false;
			}*/
						
			var sZip = document.getElementById("zipCode").value;
			if(sZip != "" && isNaN(sZip))//todo: contains only numbers and not empty sZip.contains(not numbers)
			{
				alert("Zip code should contain only numbers, please.");
				return false;
			}
			else
				return true;				
			
		}