这段代码如何让鼠标离开，下拉菜单自动关闭
//   JavaScript   Document
//function   killError(){return   true;}
//window.onerror   =   killError;
var   navmenu_niEasy_popwin_object=null;

function   getTopic(Idx){
var   topicId=Idx.id;
var   s=0;
var   topicCatch=new   Array();
var   topics=topicList();
for(var   i=0;i <topics.length;i++){
if   (topics[i][0]==topicId){topicCatch[s]=topics[i];s++;
if   (i <topics.length-1){ if   (topics[i+1][0]!=topicId){break;}}
else{break;}
}
}
return   topicCatch;
}

//所属菜单,菜单名,URL,菜单前导图片,新窗口,字体色,背景色,字体加粗
function   createPop(inAr){
var   tCD= " ";
for   (var   ii=0;ii <inAr.length;ii++){
if   (inAr[ii][1]== "- "){
if(inAr[ii][2]== " "){inAr[ii][2]= "#C0C0C0 ";}
if(inAr[ii][3]== " "){inAr[ii][3]= "#FFFFFF ";}
tCD+= " <div   style=\ "height:7px;background-color: "+inAr[ii][3]+ ";text-align:center\ "> <img   src=\ "\ "   border=\ "0\ "   width=\ "90%\ "   style=\ "background-color: "+inAr[ii][2]+ ";height:1px;margin-top:3px\ "> </div> \n "}
else{
var   TXT=URL=IMG=TRG=FT=FT1=BG=BG1= " ";
var   FTA=BGA=FT1A=FT1B=BG1A=BG1B= " ";
TXT=inAr[ii][1];
if(inAr[ii][2]!= " "){URL= "   href=\ " "+inAr[ii][2]+ "\ " "};
if(inAr[ii][3]!= " "){IMG= " <img   src=\ " "+inAr[ii][3]+ "\ "   border=0> "};
if(inAr[ii][4]==1){TRG= "   target=\ "_blank\ " "};
if(inAr[ii][5]!= " "){FT= "color: "+inAr[ii][5]+ "; ";
FTA=inAr[ii][5]};
if(inAr[ii][6]!= " "){BG= "background-color: "+inAr[ii][6]+ "; ";BGA=inAr[ii][6]};
tCD+= " <div   class= 'topic_unit '   id=\ "PopItemMark\ "   style=\ " "+FT+BG+ "\ "   onMouseover=\ "this.className= 'pover ';\ "   onMouseout=\ "this.className= 'topic_unit ';\ "> ";
tCD+=IMG+ " <a "+URL+TRG+ "   style=\ " "+FT+BG+ "\ "   onMouseover=\ "this.className= 'pover ';\ "   onMouseout=\ "this.className= 'topic_unit ';\ "   class=\ "topic_unit\ "> ";
if(inAr[ii][7]==1){tCD+= " <b> "+TXT+ " </b> "}else{tCD+=TXT};
tCD+= " </a> </div> \n ";
}
}
return   tCD;
}

function   GetPoupPanelState(obj)
{
if(typeof(window.navmenu_niEasy_popwinSub)!= "undefined ")
      {
if(navmenu_niEasy_popwinSub.style.visibility== "visible ")
{
if(navmenu_niEasy_popwin_object!=null)
{
if(navmenu_niEasy_popwin_object==obj)
{
return   false;
}
else
{
navmenu_niEasy_popwin_object=obj;
return   true;
}
}
else
{
navmenu_niEasy_popwin_object=obj;
return   true;
}
}
else
{
return   true;
}
      }
      else
      {
return   true;