var xmlhttp;
var ajax_main_ver='0.1';

function _O(idname)     
{		       
	return document.getElementById(idname);
}			       
				
function HttpGet(url,arg,func)  
{			       
	var d= new Date();
	if(arg != ''){  
		url=url+'?'+arg+'&tmp='+d.getTime();
	}		       
	else{   
		url=url+'?tmp='+d.getTime();
	}       
	if (window.XMLHttpRequest){
		xmlhttp=new XMLHttpRequest();
		xmlhttp.onreadystatechange=func;
		xmlhttp.open("GET",url,true);
		xmlhttp.send(null);
	}
	else if (window.ActiveXObject){
		xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
		if (xmlhttp){ 
			xmlhttp.onreadystatechange=func;
			xmlhttp.open("GET",url,true);
			xmlhttp.send();
		}
	}       
}