document.onmousemove = movecontent;
window.onmousemove = movecontent;
function qr_open(){
	window.open("./qr.html","","top="+y+",left="+x+",width=300,height=200");
}
function movecontent(evt){
	if(document.all){
		x = event.x+20+ document.documentElement.scrollLeft;
		y = event.y-320+ document.documentElement.scrollTop;
	}else{
		x = evt.pageX+20;
		y = evt.pageY-320;	
	}
}