要完成此效果需要两个步骤 第一步：把如下代码加入到<head>区域中 <SCRIPT LANGUAGE="JavaScript"> <!-- Begin var ie4 = (document.all) ? true : false; var ns4 = (document.layers) ? true : false; var ns6 = (document.getElementById && !document.all) ? true : false; function hidelayer(lay) { if (ie4) {document.all[lay].style.visibility = "hidden";} if (ns4) {document.layers[lay].visibility = "hide";} if (ns6) {document.getElementById([lay]).style.display = "none";} } function showlayer(lay) { if (ie4) {document.all[lay].style.visibility = "visible";} if (ns4) {document.layers[lay].visibility = "show";} if (ns6) {document.getElementById([lay]).style.display = "block";} } function writetolayer(lay,txt) { if (ie4) { document.all[lay].innerHTML = txt; } if (ns4) { document[lay].document.write(txt); document[lay].document.close(); } if (ns6) { over = document.getElementById([lay]); range = document.createRange(); range.setStartBefore(over); domfrag = range.createContextualFragment(txt); while (over.hasChildNodes()) { over.removeChild(over.lastChild); } over.appendChild(domfrag); } } // End --> </script> 第二步：把如下代码加入到<body>区域中 <SPAN ID="newlayer" style="position:absolute;; left: 267px; top: 25px; width: 230px; height: 16px">这里是层</SPAN> <div align="center"><br> <br> <br> <a href="javascript:hidelayer('newlayer');">隐藏层</a> | <a href="javascript:showlayer('newlayer');">显示层</a> | <a href="javascript:writetolayer('newlayer','这里是层一');">显示层一</a> | <a href="javascript:writetolayer('newlayer','这里是层二');">显示层二</a> </div> 载入中... 载入中...
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