// JavaScript Document
function left_subnavigation(id){
	if(document.getElementById("left_subnavigation_"+id).innerHTML == 'loading...'){
		var request; 
		if(request = xml_http_request()){
			request.onreadystatechange = function(){
				if(request.readyState==4){
					document.getElementById("left_subnavigation_"+id).innerHTML = request.responseText;
				}
			}
			request.open("GET", "left_subnavigation.php?id="+id, true);
			request.send(null);
				
		}
	}
}