function loadpage(url)
{
	var http_request = false;
	
	if (window.XMLHttpRequest) { // Mozilla, Safari,...
			http_request = new XMLHttpRequest();
			if (http_request.overrideMimeType)	http_request.overrideMimeType('text/xml');
			}else if(window.ActiveXObject) { // IE
            try{
				http_request = new ActiveXObject("Msxml2.XMLHTTP");
			}catch (e){
				try
				{
					http_request = new ActiveXObject("Microsoft.XMLHTTP");
				}catch(e){}
			}
		}
	
	http_request.onreadystatechange = function()
	{
		alert('t');
		document.a.b.maincontent.innerHTML = 'test';
		if(http_request.readyState == 4)
		{
						
				//document.a.b.maincontent.innerHTML = 'test';
				alert('hi');
				//http_request.responseText;
		}
		else alert('a');
	};
			
	http_request.open('GET', 'test.php', true);
	http_request.send(null);

}
/*
function onreadyaction()
{	alert('hi');
	if(http_request.readyState == 4)
	{
		alert('hi');
		//document.a.b.maincontent.innerHTML = http_request.responseText;
	}
}
*/