一个不错的下拉菜单，加上图片后效果极好_菜单导航特效

一个不错的下拉菜单，加上图片后效果极好,您可以先修改部分代码再运行.

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

scores = new Array(20);var numTotal=0;NS4 = (document.layers) ? 1 : 0;IE4 = (document.all) ? 1 : 0;ver4 = (NS4 || IE4) ? 1 : 0;if (ver4) {    with (document) {        write("<STYLE TYPE='text/css'>");        if (NS4) {            write(".parent {position:absolute; visibility:visible}");            write(".child {position:absolute; visibility:visible}");            write(".regular {position:absolute; visibility:visible}")        }        else {            write(".child {display:none}")        }        write("</STYLE>");    }}function getIndex(el) {    ind = null;    for (i=0; i<document.layers.length; i++) {        whichEl = document.layers[i];        if (whichEl.id == el) {            ind = i;            break;        }    }    return ind;}function arrange() {    nextY = document.layers[firstInd].pageY +document.layers[firstInd].document.height;    for (i=firstInd+1; i<document.layers.length; i++) {        whichEl = document.layers[i];        if (whichEl.visibility != "hide") {            whichEl.pageY = nextY;            nextY += whichEl.document.height;        }    }}function initIt(){    if (!ver4) return;    if (NS4) {        for (i=0; i<document.layers.length; i++) {            whichEl = document.layers[i];            if (whichEl.id.indexOf("Child") != -1) whichEl.visibility = "hide";       }        arrange();    }    else {        divColl = document.all.tags("DIV");        for (i=0; i<divColl.length; i++) {            whichEl = divColl(i);            if (whichEl.className == "child") whichEl.style.display = "none";        }    }}function expandIt(el) {    if (!ver4) return;    if (IE4) {        whichEl1 = eval(el + "Child");        for(i=1;i<=numTotal;i++){            whichEl = eval(scores[i] + "Child");            if(whichEl!=whichEl1) {                whichEl.style.display = "none";            }        }        whichEl1 = eval(el + "Child");        if (whichEl1.style.display == "none") {            whichEl1.style.display = "block";        }        else {            whichEl1.style.display = "none";        }    }    else {        whichEl = eval("document." + el + "Child");        for(i=1;i<=numTotal;i++){            whichEl = eval("document." + scores[i] + "Child");            if(whichEl!=whichEl1) {                whichEl.visibility = "hide";            }        }        if (whichEl.visibility == "hide") {            whichEl.visibility = "show";        }        else {            whichEl.visibility = "hide";        }        arrange();    }}onload = initIt;

</script>

第二步：把如下代码加入到<body>区域中

所属频道：菜单导航特效/更新时间：2011-02-23

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一个不错的下拉菜单，加上图片后效果极好_菜单导航特效

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