// JavaScript Document
function left_subnavigation(id){
	if(document.getElementById("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);
					
			}
		}		
	}
}