透明的下拉展开菜单

下面为效果显示

脚本说明:
把如下代码加入<body>区域中：
<SCRIPT language=jscript>
var mmenus    = new Array();
var misShow   = new Boolean(); 
misShow=false;
var misdown   = new Boolean();
misdown=false;
var msrcel; 
var mfromel;  
var mtoel; 
var musestatus=false;
var mthestatus="";
var mpopTimer = 0;
mmenucolor='#009AFF';mfontcolor='#FFFFFF';mmenuoutcolor='#009AFF';mmenuincolor='#009AFF';mmenuoutbordercolor='#009AFF';mmenuinbordercolor='#009AFF';mmidoutcolor='#0099FF';mmidincolor='#0099FF';mmenuovercolor='#FF0000';mitemedge='0';msubedge='1';mmenuunitwidth=60;mmenuitemwidth=160;mmenuheight=22;mmenuwidth='500';mmenuadjust=10;mmenuadjustV=0;mfonts='font-family: 宋体; font-size: 9pt; color: #FFFFFF; ';mcursor='default';

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){
menuid.style.filter='Alpha(Opacity=100)';
menuid.style.visibility='hidden';
misShow=false;
}
function mmenushow(menuid,pid){
menuid.style.filter='Alpha(Opacity=80)';
menuid.style.left=mposflag.offsetLeft+pid.offsetLeft+mmenuadjust;menuid.style.top=mposflag.offsetTop+mmenutable.offsetHeight+mmenuadjustV+1;
if(mmenuitemwidth+parseInt(menuid.style.left)>document.body.clientWidth)
menuid.style.left=document.body.clientWidth-mmenuitemwidth;
menuid.style.visibility='visible';
misShow=true;
}
function mmenu_over(menuid,x){
mtoel = getReal(window.event.toElement, "className", "coolButton");
mfromel = getReal(window.event.fromElement, "className", "coolButton");
if (mtoel == mfromel) return;
msrcel = window.event.srcElement;
if(x<0){
  misShow = false;
  mallhide();
  mtoout(msrcel);
}else{

mallhide();
  mtoin(msrcel);
  mmenushow(menuid,eval("mMenu"+x));

}
clearTimeout(mpopTimer);
}
function mmenu_out(menuid){
mtoel = getReal(window.event.toElement, "className", "coolButton");
mfromel = getReal(window.event.fromElement, "className", "coolButton");
if (mtoel == mfromel) return;	
msrcel = window.event.srcElement;
if (misShow){
mtoin(msrcel);
}else{
mnochange(msrcel);
}
mpopOut()
}
function mmenu_down(menuid,x){
msrcel = getReal(window.event.srcElement, "className", "coolButton");
  if(misShow){
  mmenuhide(menuid);
  mtoout(msrcel);
  }
  else{
  mtoin(msrcel);
  mmenushow(menuid,eval("mMenu"+x));
  misdown=true;
  }
}
function mmenu_up(){
  misdown=false;
}
function mmenuitem_over(menuid){
msrcel = getReal(window.event.srcElement, "className", "coolButton");
if(misdown){
	mtoin(msrcel);
}
else{
mtoout(msrcel);
}
if(mthestatus!=""){
	musestatus=true;
	window.status=mthestatus;
}
clearTimeout(mpopTimer);
}
function mmenuitem_out(menuid){
msrcel = getReal(window.event.srcElement, "className", "coolButton");
mnochange(msrcel);
if(musestatus)window.status="";
mpopOut()
}
function mmenuitem_down(menuid){
msrcel = getReal(window.event.srcElement, "className", "coolButton");
mtoin(msrcel)
misdown=true;
}
function mmenuitem_up(menuid){
msrcel = getReal(window.event.srcElement, "className", "coolButton");
mtoout(msrcel)
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){
	msrcel = getReal(window.event.srcElement, "className", "coolButton");
	for(var x=0;x<=mmenus.length;x++){
		if(msrcel.id=="mMenu"+x)
		return;
	}
	mallhide();
}
}
document.onclick=mbody_click;
var mMenuBodyRef;
function mwritetodocument(){
      var mwb=1;
      for(var i in document.all){
              if (document.all[i].tagName == 'BODY'){
                     mMenuBodyRef = document.all[i]
                     var stringx='<div id="mposflag" style="position:absolute;"></div><table  id=mmenutable border=0 cellpadding=0 cellspacing=2 width='+mmenuwidth+' height='+mmenuheight+' bgcolor='+mmenucolor+
                     ' onselectstart="event.returnValue=false"'+
                     ' style="filter:Alpha(Opacity=80);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="";
                     	      }else{
                     	        imgsize=" width="+thismenu.sizex+" height="+thismenu.sizey;
                     	      }
                     	var ifspace;
                     	      if(thismenu.caption==""){
                     	        ifspace="";
                     	      }else{
                     	        ifspace=" ";
                     	      }
                     	stringx += "<td class=coolButton id=mMenu"+x+" style='border: "+mitemedge+"px solid "+mmenucolor+
                     	"' width="+mmenuunitwidth+"px onmouseover=mmenu_over(mmenudiv"+x+
                     	","+x+") onmouseout=mmenu_out(mmenudiv"+x+
                     	") onmousedown=mmenu_down(mmenudiv"+x+","+x+")";
                     	      if(thismenu.command!=""){
                     	          stringx += " onmouseup=mexec2("+x+");mmenu_up();";
                     	      }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){
                        stringx+='<div id=mmenudiv'+x+' style="visiable:none"></div>';
                        }else{
                        stringx+='<div id=mmenudiv'+x+
                        ' style="filter:Alpha(Opacity=80);cursor:'+mcursor+';position:absolute;'+
                        'width:'+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=""
                     	          }else{
                     	             imgsize=" width="+thismenuitem.sizex+" height="+thismenuitem.sizey
                     	          }
                     	        var ifspace;
                     	          if(thismenu.caption==""){
                     	            ifspace="";
                     	          }else{
                     	            ifspace=" ";
                     	          }
                     		if(!thismenuitem.isline){
                     		stringx += "<tr><td class=coolButton style='border: "+mitemedge+"px solid "+mmenucolor+
                     		"' width=100% height=15px onmouseover=\"mthestatus='"+thismenuitem.statustxt+"';mmenuitem_over(mmenudiv"+x+
                     		");\" onmouseout=mmenuitem_out(mmenudiv"+x+
                     		") onmousedown=mmenuitem_down(mmenudiv"+x+") onmouseup=";
 				stringx += "mexec("+x+","+i+");mmenuitem_up(mmenudiv"+x+") ";
 				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"><img border="0" src="none.gif" width="1" height="1"></td></tr>\n';
                     		}
                     	}stringx+='</table>\n</div>'
                     	}
                     	
                }
                
                     document.write("<div align='left'>"+stringx+"</div>");
      break
    }
  }
}

function document_load(){
	mwritetodocument();

}mpmenu1=new mMenu('文件','','self','','','','');
mpmenu1.addItem(new mMenuItem('新建','javascript:alert("新建")','self',false,'新建','','','',''));
mpmenu1.addItem(new mMenuItem('打开','javascript:alert("打开")','self',false,'打开','','','',''));
mpmenu1.addItem(new mMenuItem('保存','javascript:alert("保存")','self',false,'保存','','','',''));
mpmenu1.addItem(new mMenuItem(null,null,null,true));
mpmenu1.addItem(new mMenuItem('退出','javascript:alert("退出")','self',false,'退出','','','',''));
mpmenu2=new mMenu('编辑','','self','','','','');
mpmenu2.addItem(new mMenuItem('撤销','javascript:alert("撤销")','self',false,'撤销','','','',''));
mpmenu2.addItem(new mMenuItem('重做','javascript:alert("重做")','self',false,'重做','','','',''));
mpmenu2.addItem(new mMenuItem(null,null,null,true));
mpmenu2.addItem(new mMenuItem('拷贝','javascript:alert("拷贝")','self',false,'拷贝','','','',''));
mpmenu2.addItem(new mMenuItem('粘贴','javascript:alert("粘贴")','self',false,'粘贴','','','',''));
mpmenu3=new mMenu('收藏','','self','','','','');
mpmenu3.addItem(new mMenuItem('我的主页','http://www.7stk.com','blank',false,'访问我的主页','','','',''));
mpmenu3.addItem(new mMenuItem('Yahoo','http://www.yahoo.com','blank',false,'访问Yahoo','','','',''));
mpmenu4=new mMenu('帮助','','self','','','','');
mpmenu4.addItem(new mMenuItem('内容','javascript:alert("内容")','self',false,'内容','','','',''));
mpmenu4.addItem(new mMenuItem('给我写email','mailto:webmaster@7stk.com','self',false,'给我写email','','','',''));
mpmenu4.addItem(new mMenuItem(null,null,null,true));
mpmenu4.addItem(new mMenuItem('关于','javascript:alert("关于")','self',false,'关于这个软件','','','',''));

</SCRIPT>
<SCRIPT>document_load()</SCRIPT>