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说明: 下拉菜单的导航条
效果:
运行后查看！
代码: 完成该特效分两步：
将以下代码插入到<head>区中。
<SCRIPT language=JavaScript>
<!--
function MM_goToURL() { //v3.0
var i, args=MM_goToURL.arguments; document.MM_returnValue
= false;
for (i=0; i<(args.length-1); i+=2) eval(args[i]+".location='"+args[i+1]+"'");
}
function JM_cc(ob){
var obj=MM_findObj(ob); if (obj) {
obj.select();js=obj.createTextRange();js.execCommand("Copy");}
}
function MM_findObj(n, d) { //v4.0
var p,i,x; if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length)
{
d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++)
x=d.forms[i][n];
for(i=0;!x&&d.layers&&i<d.layers.length;i++)
x=MM_findObj(n,d.layers[i].document);
if(!x && document.getElementById) x=document.getElementById(n);
return x;
}
//-->
</SCRIPT>
<SCRIPT language=JavaScript>
<!--
menuPrefix = 'menu'; // Prefix that all menu layers must
start with
// All layers with this prefix will be treated
// as a part of the menu system.
var menuTree, mouseMenu, hideTimer, doHide;
function init() {
ie4 = (document.all)?true:false;
ns4 = (document.layers)?true:false;
document.onmousemove = mouseMove;
if (ns4) { document.captureEvents(Event.MOUSEMOVE); }
}
function expandMenu(menuContainer,subContainer,menuLeft,menuTop)
{
// Hide all submenus thats's not below the current level
doHide = false;
if (menuContainer != menuTree) {
if (ie4) {
var menuLayers = document.all.tags("DIV");
for (i=0; i<menuLayers.length; i++) {
if ((menuLayers[i].id.indexOf(menuContainer) != -1) &&
(menuLayers[i].id != menuContainer)) {
hideObject(menuLayers[i].id);
}
}
}
else if (ns4) {
for (i=0; i<document.layers.length; i++) {
var menuLayer = document.layers[i];
if ((menuLayer.id.indexOf(menuContainer) != -1) &&
(menuLayer.id != menuContainer)) {
menuLayer.visibility = "hide";
}
}
}
}
// If this is item has a submenu, display it, or it it's
a toplevel menu, open it
if (subContainer) {
if ((menuLeft) && (menuTop)) {
positionObject(subContainer,menuLeft,menuTop);
hideAll();
}
else {
if (ie4) {
positionObject(subContainer, document.all[menuContainer].offsetWidth
+ document.all[menuContainer].style.pixelLeft - 10, mouseY);
}
else {
positionObject(subContainer, document.layers[menuContainer].document.width
+ document.layers[menuContainer].left + 50, mouseY);
}
}
showObject(subContainer);
menuTree = subContainer;
}
}
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