javascript 頁面 浮動 廣告 代碼

 <div id="ad" style="position: absolute">
        <a target="_blank" href="http://wpa.qq.com/msgrd?v=3&uin=442518843&site=qq&menu=yes">
            <img border="0" src="http://wpa.qq.com/pa?p=2:442518843:50" alt="點擊我!來聊天!" title="點擊我!來聊天!"></a>
    </div>
    <script type="text/javascript">
var x = 50, y = 60
var xin = true, yin = true
var step = 1
var delay = 100
var obj = document.getElementById("ad")
function float() {
var L = T = 0
var R = document.documentElement.clientWidth - obj.offsetWidth;
var B = document.documentElement.clientHeight - obj.offsetHeight;
            obj.style.left = x + document.documentElement.scrollLeft + "px";
            obj.style.top = y + document.documentElement.scrollTop + "px";
            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("float()", delay)
        obj.onmouseover = function () { clearInterval(itl) }
        obj.onmouseout = function () { itl = setInterval("float()", delay) } 
    </script>