JS动效-全屏漂浮广告JS动效-全屏漂浮广告实现我司狗皮膏药打广告的需求，一张图片全屏飘动，碰到边就改变路线，鼠标碰到

<html>
<head>
    <title>漂浮广告</title>
<body>
    <!--图片地址-->
    <img id="codefans_net" style="position:absolute" src="./images/gift.png" border="0">
    <script>
        var x = 50,
            y = 60
        var xin = true,
            yin = true
        var step = 1
        var delay = 10
        var obj = document.getElementById("codefans_net")

        function float() {
            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("float()", delay)
        obj.onmouseover = function () {
            clearInterval(itl)
        }
        obj.onmouseout = function () {
            itl = setInterval("float()", delay)
        }
    </script>
</body>
</html>