function preloading(url) 
{ 

var xhr=createXHR();    
xhr.onreadystatechange=function() 
{  
if(xhr.readyState == 4) 
{ 
var content = xhr.responseText;  
var i = new Image(); 
i.src = content; 
}  
};  
xhr.open("GET", url , true); 

xhr.send(null);  
}/*
function mouseMove (evt) {
var x=0; var y=0;
if (document.layers) {
x=evt.x; y=evt.y;
}
if (document.all) {
x=event.clientX; y=event.clientY;
} else {
if (document.getElementById) {
x=evt.clientX; y=evt.clientY;
}
}
document.getElementById('left_pop').value = x; 
document.getElementById('top_pop').value = y; 

}
if (document.layers)
document.captureEvents(Event.MOUSEMOVE);
if (document.layers || document.all)
document.onmousemove = mouseMove;
if (document.addEventListener)
document.addEventListener('mousemove', mouseMove, true);*/