脚本说明: 第一步：把如下代码加入<body>区域中 <script language="VBScript"> on error resume next if parent.navButtonStatus <> 3 then if err.number <> 0 then call parent.ThereIsAnError end if end if </script> <script language="JavaScript"> var yend; var ystart; var ydiff; var xincrement; var yincrement; var screenwidth; var screenheight; function Ypick(){ if (!document.all) return screenwidth = screensize.offsetWidth; screenheight = screensize.offsetHeight; xincrement = (screenwidth/10); ystart = Math.round(Math.random()*(screenheight-92)); yend = Math.round(Math.random()*(screenheight-92)); document.all.ball.style.top=ystart; document.all.ball.style.left=-100; if (ystart > yend){ ydiff = (ystart-yend); yincrement = (ydiff/xincrement); Moveneg(); } else { ydiff = (yend-ystart); yincrement = (ydiff/xincrement); Movepos(); } } function Moveneg(){ if (screenwidth > parseInt(document.all.ball.style.left)) { with (document.all.ball) { style.left = parseInt(style.pixelLeft + 10); style.top = parseInt(style.pixelTop - yincrement); } setTimeout('Moveneg()',20); } else { with (document.all.ball) { style.left = parseInt(style.pixelLeft - screenwidth); style.top = parseInt(style.pixelTop - yend); } Ypick(); } } function Movepos(){ if (screenwidth > parseInt(document.all.ball.style.left)) { with (document.all.ball) { style.left = parseInt(style.pixelLeft + 10); style.top = parseInt(style.pixelTop + yincrement); } setTimeout('Movepos()',60); } else { with (document.all.ball) { style.left = parseInt(style.pixelLeft - screenwidth); style.top = parseInt(style.pixelTop - yend); } Ypick(); } } </script> <div id="screensize" style="position: absolute; top: 0; left: 0; height: 100%; width: 100%"></div> <p><img id="ball" SRC="image1.gif" style="container:in-flow;position:relative;left:-100;top:0;visibility:show"> 第二步：把<body>中的内容改为： <body onload="Ypick()">
