页面上下滚动
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脚本说明: 第一步:把如下代码加入<head>区域中 <style type="text/css"> #item {position:absolute; visibility:hidden; left:0px} </style> <SCRIPT LANGUAGE="JavaScript"> <!-- Begin var isNS=(document.layers); var _all=(isNS)? '' : 'all.' ; var _style=(isNS)? '' : '.style' ; var _visible=(isNS)? 'show' : 'visible'; var w_x, w_y, item, okscroll=false, godown; function init(){ item=eval('document.'+_all+'item'+_style); getwindowsize(); item.visibility=_visible; scrollpage(); } function getwindowsize() { w_x=(isNS)? window.innerWidth-5 : document.body.clientWidth; w_y=(isNS)? window.innerHeight : document.body.clientHeight; (isNS)? item.clip.width=42: item.width=42; (isNS)? item.clip.height=20 : item.height=20; moveitem(); } function resizeNS() { setTimeout('document.location.reload()',400); } function moveitem() { if (isNS) { item.moveTo((pageXOffset+w_x-70),(w_y+pageYOffset-50)) }else{ item.pixelLeft=document.body.scrollLeft+w_x-70; item.pixelTop=w_y+document.body.scrollTop-50; } } window.onload=init; (isNS) ? window.onresize=resizeNS : window.onresize=getwindowsize ; function scrollpage() { status = ''; if (okscroll) { if (godown) { (isNS)? window.scrollBy(0,4) : window.scrollBy(0,4) ; } else { (isNS)? window.scrollBy(0,-4) : window.scrollBy(0,-4) ; } } moveitem(); setTimeout('scrollpage()', 40); } // End --> </script> 第二步:把如下代码加入<body>区域中 <div id="item"> <a href="javascript:void(0)" onMouseover="okscroll=true; godown=true" onMouseout="okscroll=false"><img src="down.gif" border="0"></a><a href="javascript:void(0)" onMouseover="okscroll=true; godown=false" onMouseout="okscroll=false"><img src="up.gif" border="0"></a> </div>
