要完成此效果需要两个步骤 第一步：把如下代码加入到区域中 <script LANGUAGE="JavaScript"> var newtop=0 var newleft=0 if (navigator.appName == "Netscape") { layerStyleRef="layer."; layerRef="document.layers"; styleSwitch=""; } else { layerStyleRef="layer.style."; layerRef="document.all"; styleSwitch=".style"; } function doMouseMove() { layerName = 'iit' eval('var curElement='+layerRef+'["'+layerName+'"]') eval(layerRef+'["'+layerName+'"]'+styleSwitch+'.visibility="hidden"') eval('curElement'+styleSwitch+'.visibility="visible"') eval('newleft=document.body.clientWidth-curElement'+styleSwitch+'.pixelWidth') eval('newtop=document.body.clientHeight-curElement'+styleSwitch+'.pixelHeight') eval('height=curElement'+styleSwitch+'.height') eval('width=curElement'+styleSwitch+'.width') width=parseInt(width) height=parseInt(height) if (event.clientX > (document.body.clientWidth - 5 - width)) { newleft=document.body.clientWidth + document.body.scrollLeft - 5 - width } else { newleft=document.body.scrollLeft + event.clientX } eval('curElement'+styleSwitch+'.pixelLeft=newleft') if (event.clientY > (document.body.clientHeight - 5 - height)) { newtop=document.body.clientHeight + document.body.scrollTop - 5 - height } else { newtop=document.body.scrollTop + event.clientY } eval('curElement'+styleSwitch+'.pixelTop=newtop') } document.onmousemove = doMouseMove; </script> 第二步：把如下代码加入到区域中 <script language="javascript"> if (navigator.appName == "Netscape") { } else { document.write('') } </script>