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js实现图片漂浮效果的方法

  作者：bea

本文实例讲述了js实现图片漂浮效果的方法。分享给大家供大家参考。具体分析如下： 描述：打开网页就看到不停在飘动的图片，点击连接到其他页面；起到着重强调的效果！ 代码如下: <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>test</title> <style
本文实例讲述了js实现图片漂浮效果的方法。分享给大家供大家参考。具体分析如下：
描述：打开网页就看到不停在飘动的图片，点击连接到其他页面；起到着重强调的效果！


代码如下:


<html> 
<head> 
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> 
    <title>test</title> 
    <style type="text/css">  
        #All{ width: 100%; height: 3000px;} 
    </style> 
</head> 
<body>   
    <div id="All">  
        <div id="img" style="position: absolute; z-index:99;">  
            <a href="#" target="_blank"><img src="Images/OPVTI.jpg" border="0"  style="cursor: pointer;" style="cursor: pointer;" /></a>  
            <script language="JavaScript"> 
    <!--Begin 
                var xPos = document.body.clientWidth - 20; 
                var yPos = document.body.clientHeight / 2; 
                var step = 1; 
                var delay = 10; 
                var height = 0; 
                var Hoffset = 0; 
                var Woffset = 0; 
                var yon = 0; 
                var xon = 0; 
                var pause = true; 
                var interval; 
                img.style.top = yPos; 
                function changePos() { 
                    width = document.body.clientWidth; 
                    height = document.body.clientHeight; 
                    Hoffset = img.offsetHeight; 
                    Woffset = img.offsetWidth; 
                    img.style.left = xPos + document.body.scrollLeft; 
                    img.style.top = yPos + document.body.scrollTop; 
                    if (yon) { 
                        yPos = yPos + step; 
                    } else { 
                        yPos = yPos - step; 
                    }   
                    if (yPos < 0) { 
                        yon = 1; 
                        yPos = 0; 
                    } 
                    if (yPos >= (height - Hoffset)) { 
                        yon = 0; 
                        yPos = (height - Hoffset); 
                    } 
                    if (xon) { 
                        xPos = xPos + step; 
                    } else { 
                        xPos = xPos - step; 
                    } 
                    if (xPos < 0) { 
                        xon = 1; 
                        xPos = 0; 
                    } 
                    if (xPos >= (width - Woffset)) { 
                        xon = 0; 
                        xPos = (width - Woffset); 
                    } 
                }  
                function start() { 
                    img.visibility = "visible"; 
                    interval = setInterval('changePos()', delay); 
                } 
                function pause_resume() { 
                    if (pause) { 
                        clearInterval(interval); 
                        pause = false; 
                    } else { 
                        interval = setInterval('changePos()', delay); 
                        pause = true; 
                    } 
                }  
                start(); 
    //  End --> 
            </script> 
        </div> 
    </div> 
</body> 
</html>


希望本文所述对大家的javascript程序设计有所帮助。


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