[Nekromancer]

<script type="text/javascript">
function now(){
	return (new Date).getTime();
}
var timer = 0,
loadimg = function(img){
timer = now();
img.src = 'http://javascript.ru/files/onready/img5.php';
},
loadedimg = function(img){
var loadtime = now()-timer;
alert(loadtime);
};
</script>
<img src="javascript:true;" onerror="loadimg(this)" onload="loadedimg(this)" alt="Загрзука.." title="Загрзука..">