var isMapLoaded = false;
		$(window).load(function() {

			  //onclick event
			  $("#btpcMapTrigger").click(function() {
				//Start lightbox
				$("#btpcMap").overlay({
					api:true
				}).load();
				
				//Start ajax if map has not been loaded
				if (!isMapLoaded) {
					$.ajax({ url: "http://" + document.domain + "/BTMAP/BTMap.php?q=6", cache:false,  success: function(html){
						$("#btpcMap").append(html);
						isMapLoaded = true;
					  }});
				  }
				
			  });
				
		});