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1.45 页面树形菜单.html
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1.45 页面树形菜单.html
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<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>标题页</title>
<script language="JavaScript">
//判断浏览器的变量
NS4 = (document.layers) ? 1 : 0;
IE4 = (document.all) ? 1 : 0;
ver4 = (NS4 || IE4) ? 1 : 0;
//定义各个层的位置及显示状态
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>");
}
}
//当菜单打开时，页面上菜单以下的东西的位置顺序往下推，菜单合起时，菜单以下的东西自动上移。
function arrange() {
nextY = document.layers[firstInd].pageY +document.layers[firstInd].document.height;
for (i=firstInd+1; i<document.layers.length; i++) {
whichele = document.layers[i];
if (whichele.visibility != "hide") {
whichele.pageY = nextY;
nextY += whichele.document.height;
}
}
}
//初始化菜单
function initIt(){
if (!ver4) return;
if (NS4) {
for (i=0; i<document.layers.length; i++) {
whichele = document.layers[i];
if (whichele.id.indexOf("Child") != -1) whichele.visibility = "hide";
}
arrange();
}
else {
divColl = document.all.tags("DIV");
for (i=0; i<divColl.length; i++) {
whichele = divColl(i);
if (whichele.className == "child") whichele.style.display = "none";
}
}
}
//展开菜单的方法
function expandIt(ele) {
if (!ver4) return;
if (IE4) {
whichele = eval(ele + "Child");
if (whichele.style.display == "none") {
whichele.style.display = "block";
}
else {
whichele.style.display = "none";
}
}
else {
whichele = eval("document." + ele + "Child");
if (whichele.visibility == "hide") {
whichele.visibility = "show";
}
else {
whichele.visibility = "hide";
}
arrange();
}
}
onload = initIt;
</script>
</head>
<body>
<div id="menuParent" class="parent"> <a href="#" onClick="expandIt('menu'); return false" >父菜单一</a></div>
<div id="menuChild" class="child"> <a href="#" target="_blank" >子菜单一</a><br>
<a href="#" target="_blank" >子菜单二</a><br>
<a href="#" target="_blank" >子菜单三</a></div>
<div id="Menu2Parent" class="parent"> <a href="#" onClick="expandIt('Menu2'); return false" >父菜单二</a></div>
<div id="Menu2Child" class="child"> <a href="#" target="_blank" >子菜单一</a><br>
<a href="#" target="_blank" >子菜单二</a><br>
<a href="#" target="_blank" >子菜单三</a></div>
<div id="Menu3Parent" class="parent"> <a href="#" onClick="expandIt('Menu3'); return false" >父菜单三</a></div>
<div id="Menu3Child" class="child"> <a href="#" target="_blank" >子菜单一</a><br>
<a href="#" target="_blank" >子菜单二</a><br>
<a href="#" target="_blank" >子菜单三</a></div>
</body>
</html>