漂浮窗口代码

var x = 50,y = 60

var xin = true, yin = true

var step = 1

var delay = 10

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= setInt