document.write("<div id=\"ad\" style=\"position:absolute\">");
document.write("<a href='css_psaresult.pdf' target=_blank>");
document.write("<img src='images/luckydraw_banner.gif' width=168 height=123 border=0>");
document.write("</a>");
document.write("</div>");
//var x = 50,y = 60
var xin = true, yin = true
var step = 1 
var delay = 30
var obj=document.getElementById("ad") 
var L = R = (document.body.clientWidth - 778 + 50) / 2;
var T =  (document.body.clientHeight - 495 + 50) / 2;;
//var R = document.body.clientWidth-obj.offsetWidth
//var B = document.body.clientHeight-obj.offsetHeight
var B = T + 495 - 50 - obj.offsetHeight;
var x = L;
var y =T;
function floatAD() {
	obj.style.top = y + document.body.scrollTop
	//obj.style.left = x + document.body.scrollLeft
	obj.style.left = L;
	x = x + step*(xin?1:-1) 
	if (x < L) { xin = true; x = L} 
	if (x > R){ xin = false; x = R} 
	y = y + step*(yin?1:-1) 
	if (y < T) { yin = true; y = T } 
	if (y > B) { yin = false; y = B } 
}
var itl= setInterval("floatAD()", delay) 
obj.onmouseover=function(){clearInterval(itl)} 
obj.onmouseout=function(){itl=setInterval("floatAD()", delay)}