var initTop = 250;
function move() {
	var fudiv = document.getElementById("Float_ad");
	var clodiv = document.getElementById("Float_ad_close");
	fudiv.style.pixelTop = initTop + document.documentElement.scrollTop;
	clodiv.style.pixelTop = initTop + document.documentElement.scrollTop+1;
}
function closediv() {
	document.getElementById("Float_ad").style.display = "none";
	document.getElementById("Float_ad_close").style.display = "none";
}

window.onscroll = move;