function move_div(id, x, y) {
	if (window.pageYOffset > y) document.getElementById(id).style.top = window.pageYOffset - y + "px";
	else document.getElementById(id).style.top = 0 + "px";
	if (window.pageYOffset > x) document.getElementById(id).style.left = window.pageXOffset - x +"px";
	else document.getElementById(id).style.left = 0 +"px";
}