function GetXmlHttpObject(){ 
	var objXMLHttp=null;
	if (window.XMLHttpRequest){
		objXMLHttp=new XMLHttpRequest();
	}
	else if (window.ActiveXObject){
		objXMLHttp=new ActiveXObject("Microsoft.XMLHTTP");
	}
	return objXMLHttp;
}     

function load_content(div, url, poststr, upload){
	if (!div || !url){ return; }
	id(div).innerHTML = '<span class="loading">Loading..</span>';
	xmlHttp=GetXmlHttpObject();
	if (xmlHttp==null){
		alert ("Browser does not support HTTP Request");
		return;
	}
	xmlHttp.onreadystatechange = function (){
		if (xmlHttp.readyState == 4 || xmlHttp.readyState=="complete"){
			id(div).innerHTML = xmlHttp.responseText;
			setForm();
			hide_calendar();
			date_chooser_init();
			date_chooser_call();
		}
	}
	if (poststr){
		xmlHttp.open('POST', url, true);
		xmlHttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
		xmlHttp.setRequestHeader("Content-length", poststr.length);
		xmlHttp.setRequestHeader("Connection", "close");
		xmlHttp.send(poststr);	
	}
	else {
		xmlHttp.open("GET", url, true);
		xmlHttp.send(null);
	}
}