loading=new Image(420,327);
loading.src="/im/loading.jpg"

target=new Image(420,327);
var q=0;

function pre(imgsrc){
	elemScr=document.getElementById('scr');
	elemScr.src = loading.src;
	if (q<3)
	{
		q++;
		timee=setTimeout('pre("'+imgsrc+'")',100);
	} else {
		q=0;
		clearTimeout(timee);
		target.src = imgsrc;
		target.onload=pree(elemScr,target);
		
	}
	
	
	
}


function pree(a,b){
	//elemTarget=document.getElementById(b);
	a.src = b.src;
		//elemTarget.src;
}