var x = 50,y = 60 
var xin = true, yin = true 
var step = 1 
var delay = 10 
var obj=document.getelementbyid("www_qpsh_com") 
function floatwww_qpsh_com() { 
var l=t=0
//by www.qpsh.com
var r= document.body.clientwidth-obj.offsetwidth 
var b = document.body.clientheight-obj.offsetheight 
obj.style.left = x + document.body.scrollleft 
obj.style.top = y + document.body.scrolltop 
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("floatwww_qpsh_com()", delay) 
obj.onmouseover=function(){clearinterval(itl)} 
obj.onmouseout=function(){itl=setinterval("floatwww_qpsh_com()", delay)}