有没有现成的这样的效果呢?拿过来就可以用的,放分50

<body onmousemove="closesubnav(event);">
function menu(allitems,thisitem,startstate){ 
  callname= "gl"+thisitem;
  divname="subglobal"+thisitem;  
this.numberofmenuitems = allitems;
this.caller = document.getElementById(callname);
this.thediv = document.getElementById(divname);
this.thediv.style.visibility = startstate;
}
 
//menu methods
function ehandler(event,theobj){
  for (var i=1; i<= theobj.numberofmenuitems; i++){
  var shutdiv =eval( "menuitem"+i+".thediv");
    shutdiv.style.visibility="hidden";
}
theobj.thediv.style.visibility="visible";
}

function closesubnav(event){
 if (((event.clientY <1)||(event.clientY > 250))||((event.clientX <40)||(event.clientX > 250))){
    for (var i=1; i<= numofitems; i++){
      var shutdiv =eval('menuitem'+i+'.thediv');
shutdiv.style.visibility='hidden';
}  
}
}
// -->
</script><DIV><DIV><DIV><DIV><DIV><DIV><DIV><DIV><DIV><DIV><DIV><DIV><DIV><DIV><DIV><DIV><DIV><DIV><DIV><DIV><DIV><DIV><DIV><DIV><DIV>