function createHttpRequest(){
	var req = null;
	try{
		req = new XMLHttpRequest();
	}
	catch(e){
		try{
			req = new ActiveXObject("Msxml2.XMLHTTP");
		}
		catch(e){
			try{
				req = new ActiveXObject("Microsoft.XMLHTTP");
			}
			catch(e){
				return null;
			}
		}
	}
	return req;
}
function update(){
	if(httpreq.readyState == 4 && httpreq.status == 200){
		document.getElementById("productschedule").outerHTML = httpreq.responseText;
		document.getElementById("e_date").focus();
	}
}