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var x = 1200,y = 60 var xin = true, yin = true var step = 1 var delay = 40 var obj=document.getElementById("ad") function floatAD() { var L=T=0 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('floatAD()', delay) obj.onmouseover=function(){clearInterval(itl)} obj.onmouseout=function(){itl=setInterval('floatAD()', delay)}
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