代码简介：
酷似Windows的仿FLASH多级下拉菜单，动画展开菜单项，还有淡入淡出效果，很不错吧！不过缺点是完全依靠JS，不能由程序动态控制输出，不过也不一定，看你水平有多高啦！
代码内容：
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>仿FLASH类似Windows的多级下拉菜单代码_网页代码站(www.webdm.cn)</title>
</head>
<body>
<SCRIPT language="jscript.encode">
var mmenus = new Array();
var misShow = new Boolean();
misShow=false;
var misdown = new Boolean();
misdown=false;
var musestatus=false;
var mpopTimer = 0;
mmenucolor='#FFE1F5';mfontcolor='MenuText';mmenuoutcolor='#FFE1F5';mmenuincolor='#FFE1F5';mmenuoutbordercolor='
#FFFFFF';mmenuinbordercolor='#000000';mmidoutcolor='#E2DFDA';mmidincolor='#8D8A85';mmenuovercolor='MenuText';mi
temedge='1';msubedge='1';mmenuunitwidth=50;mmenuitemwidth=100;mmenuheight=22;mmenuwidth='320';mmenuadjust=0;mme
nuadjustV=0;mfonts='font-family: 宋体; font-size: 9pt; color: MenuText; ';mcursor='default';
var fadeSteps = 15;
var fademsec = 100;//显示速度
var fadeArray = new Array();
function fade(el, fadeIn, steps, msec) {
if (steps == null) steps = fadeSteps;
if (msec == null) msec = fademsec;
if (el.fadeIndex == null)
el.fadeIndex = fadeArray.length;
fadeArray[el.fadeIndex] = el;
if (el.fadeStepNumber == null) {
if (el.style.visibility == "hidden")
el.fadeStepNumber = 0;
else
el.fadeStepNumber = steps;
if (fadeIn)
el.style.filter = "Alpha(Opacity=0)";
else
el.style.filter = "Alpha(Opacity=100)";
}
window.setTimeout("repeatFade(" + fadeIn + "," + el.fadeIndex + "," + steps + "," + msec + ")", msec);
}
function repeatFade(fadeIn, index, steps, msec) {
el = fadeArray[index];
c = el.fadeStepNumber;
if (el.fadeTimer != null)
window.clearTimeout(el.fadeTimer);
if ((c == 0) && (!fadeIn)) {
el.style.visibility = "hidden";
return;
}
else if ((c==steps) && (fadeIn)) {
el.style.filter = "";
el.style.visibility = "visible";
return;
}
else {
(fadeIn) ? c++ : c--;
el.style.visibility = "visible";
el.style.filter = "Alpha(Opacity=" + 100*c/steps + ")";
el.fadeStepNumber = c;
el.fadeTimer = window.setTimeout("repeatFade(" + fadeIn + "," + index + "," + steps + "," + msec + ")",
msec);
}
}
function stoperror(){
return true;
}
window.onerror=stoperror;
function mpopOut() {
mpopTimer = setTimeout('mallhide()', 500);
}
function getReal(el, type, value) {
temp = el;
while ((temp != null) && (temp.tagName != "BODY")) {
if (eval("temp." + type) == value) {
el = temp;
return el;
}
temp = temp.parentElement;
}
return el;
}
function mMenuRegister(menu)
{
mmenus[mmenus.length] = menu
return (mmenus.length - 1)
}
function mMenuItem(caption,command,target,isline,statustxt,img,sizex,sizey,pos){
this.caption=caption;
this.command=command;
this.target=target;
this.isline=isline;
this.statustxt=statustxt;
this.img=img;
this.sizex=sizex;
this.sizey=sizey;
this.pos=pos;
}
function mMenu(caption,command,target,img,sizex,sizey,pos){
this.items = new Array();
this.caption=caption;
this.command=command;
this.target=target;
this.img=img;
this.sizex=sizex;
this.sizey=sizey;
this.pos=pos;
this.id=mMenuRegister(this);
}
function mMenuAddItem(item)
{
this.items[this.items.length] = item
item.parent = this.id;
this.children=true;
}
mMenu.prototype.addItem = mMenuAddItem;
function mtoout(src){
/*/*/
src.style.borderLeftColor=mmenuoutbordercolor;
src.style.borderRightColor=mmenuinbordercolor;
src.style.borderTopColor=mmenuoutbordercolor;
src.style.borderBottomColor=mmenuinbordercolor;
src.style.backgroundColor=mmenuoutcolor;
src.style.color=mmenuovercolor;
}
function mtoin(src){
/*/*/
src.style.borderLeftColor=mmenuinbordercolor;
src.style.borderRightColor=mmenuoutbordercolor;
src.style.borderTopColor=mmenuinbordercolor;
src.style.borderBottomColor=mmenuoutbordercolor;
src.style.backgroundColor=mmenuincolor;
src.style.color=mmenuovercolor;
}
function mnochange(src){
src.style.borderLeftColor=mmenucolor;
src.style.borderRightColor=mmenucolor;
src.style.borderTopColor=mmenucolor;
src.style.borderBottomColor=mmenucolor;
src.style.backgroundColor='';
src.style.color=mfontcolor;
}
function mallhide(){
for(var nummenu=0;nummenu<mmenus.length;nummenu++){
var themenu=document.all['mMenu'+nummenu]
var themenudiv=document.all['mmenudiv'+nummenu]
mnochange(themenu);
mmenuhide(themenudiv);
}
}
function mmenuhide(menuid){
fade(menuid,false,5);
misShow=false;
}
function mmenushow(menuid,pid){
menuid.style.left=mposflag.offsetLeft+pid.offsetLeft+mmenuadjust;menuid.style.top=mposflag.offsetTop+mmenutable
.offsetHeight+mmenuadjustV;
if(mmenuitemwidth+parseInt(menuid.style.left)>document.body.clientWidth+document.body.scrollLeft)
menuid.style.left=document.body.clientWidth+document.body.scrollLeft-mmenuitemwidth;
fade(menuid,true,5);
misShow=true;
}
function mmenu_over(menuid,x){
toel = getReal(window.event.toElement, "className", "coolButton");
fromel = getReal(window.event.fromElement, "className", "coolButton");
if (toel == fromel) return;
if(x==0||x==4){
misShow = false;
mallhide();
mtoout(eval("mMenu"+x));
}else{
mallhide();
mtoin(eval("mMenu"+x));
mmenushow(menuid,eval("mMenu"+x));
}
clearTimeout(mpopTimer);
}
function mmenu_out(x){
toel = getReal(window.event.toElement, "className", "coolButton");
fromel = getReal(window.event.fromElement, "className", "coolButton");
if (toel == fromel) return;
if (misShow){
mtoin(eval("mMenu"+x));
}else{
mnochange(eval("mMenu"+x));
}
mpopOut()
}
function mmenu_down(menuid,x){
if(misShow){
mmenuhide(menuid);
mtoout(eval("mMenu"+x));
}
else{
mtoin(eval("mMenu"+x));
mmenushow(menuid,eval("mMenu"+x));
misdown=true;
}
}
function mmenu_up(){
misdown=false;
}
function mmenuitem_over(x,i){
srcel = getReal(window.event.srcElement, "className", "coolButton");
if(misdown){
mtoin(srcel);
}
else{
mtoout(srcel);
}
mthestatus = mmenus[x].items[i].statustxt;
if(mthestatus!=""){
musestatus=true;
window.status=mthestatus;
}
clearTimeout(mpopTimer);
}
function mmenuitem_out(){
srcel = getReal(window.event.srcElement, "className", "coolButton");
mnochange(srcel);
if(musestatus)window.status="";
mpopOut()
}
function mmenuitem_down(){
srcel = getReal(window.event.srcElement, "className", "coolButton");
mtoin(srcel)
misdown=true;
}
function mmenuitem_up(){
srcel = getReal(window.event.srcElement, "className", "coolButton");
mtoout(srcel)
misdown=false;
}
function mexec2(x){
var cmd;
if(mmenus[x].target=="blank"){
cmd = "window.open('"+mmenus[x].command+"')";
}else{
cmd = mmenus[x].target+".location=\""+mmenus[x].command+"\"";
}
eval(cmd);
}
function mexec(x,i){
var cmd;
if(mmenus[x].items[i].target=="blank"){
cmd = "window.open('"+mmenus[x].items[i].command+"')";
}else{
cmd = mmenus[x].items[i].target+".location=\""+mmenus[x].items[i].command+"\"";
}
eval(cmd);
}
function mbody_click(){
if (misShow){
srcel = getReal(window.event.srcElement, "className", "coolButton");
for(var x=0;x<=mmenus.length;x++){
if(srcel.id=="mMenu"+x)
return;
}
mallhide();
}
}
document.onclick=mbody_click;
function mwritetodocument(){
var mwb=1;
var stringx='<div id="mposflag" style="position:absolute;"></div><table id=mmenutable
border=0 cellpadding=3 cellspacing=2 width='+mmenuwidth+' height='+mmenuheight+' bgcolor='+mmenucolor+
' onselectstart="event.returnValue=false"'+
' style="cursor:'+mcursor+';'+mfonts+
' border-left: '+mwb+'px solid '+mmenuoutbordercolor+';'+
' border-right: '+mwb+'px solid '+mmenuinbordercolor+'; '+
'border-top: '+mwb+'px solid '+mmenuoutbordercolor+'; '+
'border-bottom: '+mwb+'px solid '+mmenuinbordercolor+'; padding:0px"><tr>'
for(var x=0;x<mmenus.length;x++){
var thismenu=mmenus[x];
var imgsize="";
if(thismenu.sizex!="0"||thismenu.sizey!="0")imgsize=" width="+thismenu.sizex+"
height="+thismenu.sizey;
var ifspace="";
if(thismenu.caption!="")ifspace=" ";
stringx += "<td nowrap class=coolButton id=mMenu"+x+" style='border: "+mitemedge+"px
solid "+mmenucolor+
"' width="+mmenuunitwidth+"px onmouseover=mmenu_over(mmenudiv"+x+
","+x+") onmouseout=mmenu_out("+x+
") onmousedown=mmenu_down(mmenudiv"+x+","+x+")";
if(thismenu.command!=""){
stringx += " onmouseup=mmenu_up();mexec2("+x+");";
}else{
stringx += " onmouseup=mmenu_up()";
}
if(thismenu.pos=="0"){
stringx += " align=center><img align=absmiddle
src='"+thismenu.img+"'"+imgsize+">"+ifspace+thismenu.caption+"</td>";
}else if(thismenu.pos=="1"){
stringx += " align=center>"+thismenu.caption+ifspace+"<img align=absmiddle
src='"+thismenu.img+"'"+imgsize+"></td>";
}else if(thismenu.pos=="2"){
stringx += " align=center background='"+thismenu.img+"'> "+thismenu.caption+"
</td>";
}else{
stringx += " align=center> "+thismenu.caption+" </td>";
}
stringx += "";
}
stringx+="<td width=*> </td></tr></table>";
for(var x=0;x<mmenus.length;x++){
thismenu=mmenus[x];
if(x==0||x==4){
stringx+='<div id=mmenudiv'+x+' style="visiable:none"></div>';
}else{
stringx+='<div id=mmenudiv'+x+
' style="cursor:'+mcursor+';position:absolute;'+
''+mmenuitemwidth+'px; z-index:'+(x+100);
if(mmenuinbordercolor!=mmenuoutbordercolor && msubedge=="0"){
stringx+=';border-left: 1px solid '+mmidoutcolor+
';border-top: 1px solid '+mmidoutcolor;}
stringx+=';border-right: 1px solid '+mmenuinbordercolor+
';border-bottom: 1px solid '+mmenuinbordercolor+';visibility:hidden"
onselectstart="event.returnValue=false">\n'+
'<table width="100%" border="0" height="100%" align="center" cellpadding="0"
cellspacing="2" '+
'style="'+mfonts+' border-left: 1px solid '+mmenuoutbordercolor;
if(mmenuinbordercolor!=mmenuoutbordercolor && msubedge=="0"){
stringx+=';border-right: 1px solid '+mmidincolor+
';border-bottom: 1px solid '+mmidincolor;}
stringx+=';border-top: 1px solid '+mmenuoutbordercolor+
';padding: 4px" bgcolor='+mmenucolor+'>\n'
for(var i=0;i<thismenu.items.length;i++){
var thismenuitem=thismenu.items[i];
var imgsize="";
if(thismenuitem.sizex!="0"||thismenuitem.sizey!="0")imgsize="
width="+thismenuitem.sizex+" height="+thismenuitem.sizey;
var ifspace="";
if(thismenu.caption!="")ifspace=" ";
if(!thismenuitem.isline){
stringx += "<tr><td class=coolButton style='border: "+mitemedge+"px solid
"+mmenucolor+
"' width=100% height=15px onmouseover=\"mmenuitem_over("+x+","+i+
");\" onmouseout=mmenuitem_out() onmousedown=mmenuitem_down() onmouseup=";
stringx += "mmenuitem_up();mexec("+x+","+i+"); ";
if(thismenuitem.pos=="0"){
stringx += "><img align=absmiddle
src='"+thismenuitem.img+"'"+imgsize+">"+ifspace+thismenuitem.caption+"</td></tr>";
}else if(thismenuitem.pos=="1"){
stringx += ">"+thismenuitem.caption+ifspace+"<img align=absmiddle
src='"+thismenuitem.img+"'"+imgsize+"></td></tr>";
}else if(thismenuitem.pos=="2"){
stringx +=
"background='"+thismenuitem.img+"'>"+thismenuitem.caption+"</td></tr>";
}else{
stringx += ">"+thismenuitem.caption+"</td></tr>";
}
}else{
stringx+='<tr><td height="1" background="hr.gif" onmousemove="clearTimeout
(mpopTimer);"><img height="1" width="1" src="none.gif" border="0"></td></tr>\n';
}
}stringx+='</table>\n</div>'
}
}
document.write("<div align='left'>"+stringx+"</div>");
}
mpmenu1=new mMenu('代码站','http://webdm.cn','self','','','','');
mpmenu2=new mMenu('网页制作','/','self','','','','');
mpmenu2.addItem(new mMenuItem('人物图库','/','self',false,'','','','',''));
mpmenu2.addItem(new mMenuItem('风景图库','/','self',false,'','','','',''));
mpmenu2.addItem(new mMenuItem('花草图库','/','self',false,'','','','',''));
mpmenu2.addItem(new mMenuItem('其它图库','/','self',false,'','','','',''));
mpmenu3=new mMenu('网页素材','/','self','','','','');
mpmenu3.addItem(new mMenuItem('线条图库','/','self',false,'','','','',''));
mpmenu3.addItem(new mMenuItem('按钮图库','/','self',false,'','','','',''));
mpmenu3.addItem(new mMenuItem('其它图库','/','self',false,'','','','',''));
mpmenu4=new mMenu('源码下载','/','self','','','','');
mpmenu4.addItem(new mMenuItem('最新源码','/','self',false,'','','','',''));
mpmenu4.addItem(new mMenuItem('ASP源码','/','self',false,'','','','',''));
mpmenu4.addItem(new mMenuItem('PHP源码','/','self',false,'','','','',''));
mpmenu4.addItem(new mMenuItem('JSP源码','/','self',false,'','','','',''));
mpmenu4=new mMenu('网页特效','/','self','','','','');
mwritetodocument();
</SCRIPT>
</body>
</html>
<br>
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代码来自：http://www.webdm.cn/webcode/e363f780-19d9-4c9b-b453-113d58f74a19.html