var req, image, warning, imagepath;

function chk_image(_imagepath)
{
	imagepath = _imagepath + "?num=" + Math.floor(Math.random()*1000000000000);
	req = getreq();
	req.onreadystatechange = imagexists;
	//alert("Check img: " + imagepath);		  
	//req.open("GET", imagepath + "?num=" + Math.floor(Math.random()*1000000000000), true);
	req.open("GET", imagepath, true);
	req.send(null);
	//req.send();
	//alert(req.statusText);
}
 
function imagexists()
{
	//alert("State: " + req.readyState)
	if(req.readyState == 4)
	{
		//alert("Status: " + req.status);
		if(req.status == 200)
		{
			//alert("Calling: " + imagepath);
			GB_showImage("","../"+imagepath);
		}
	}
}
 
function getreq()
{
	if(window.XMLHttpRequest)
		return new XMLHttpRequest();
	else if(window.ActiveXObject)
		return new ActiveXObject("Microsoft.XMLHTTP");
}