function execute_ajax(url,space_id){
	//alert('in execute');
	xmlHttp=GetXmlHttpObject();
	if (xmlHttp==null){
  	   alert ("Browser does not support HTTP Request");
  	   return;
	} 
	xmlHttp.onreadystatechange=stateChanged; 
	xmlHttp.open("GET",url,true);
	xmlHttp.send(null);
	xmlHttp.readyState=null;
}

function stateChanged(){
	if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete"){
		//alert(xmlHttp.responseText);
		document.getElementById(space_id).innerHTML=xmlHttp.responseText;
	} 
}

function GetXmlHttpObject(){
	xmlHttp=null;
	try{
 		// Firefox, Opera 8.0+, Safari
 		xmlHttp=new XMLHttpRequest();
	}
	catch (e){
 		// Internet Explorer
 		try{
  			xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
		}
		catch (e){
  			xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
		}
	}
	return xmlHttp;
}