if(document.attachEvent){
listen_event=function(elem,name,call){
    elem.attachEvent("on"+name,call)
}
unlisten_event=function(elem,name,call){
    elem.detachEvent("on"+name,call)
}
stop_event=function(e){
    e.cancelBubble = true;
}
}else{
listen_event=function(elem,name,call,useCapture){
    useCapture=useCapture||false;
    elem.addEventListener(name,call,useCapture)
}
unlisten_event=function(elem,name,call,useCapture){
    useCapture=useCapture||false;
    elem.removeEventListener(name,call,useCapture)
}
stop_event=function(e){
    e.stopPropagation();
}
}

function menu_pop(btn,id){
var elem=document.getElementById(id);
if(!elem)return;
if(elem.style.display!="block"){
$(btn).addClass("drop_down_btn_active").blur()
elem.style.display="block";
setTimeout(function(){
listen_event(document,"click",function(){
    $(btn).removeClass("drop_down_btn_active").blur()
    unlisten_event(document,"click",arguments.callee)
    elem.style.display="";
},false)
},0)
}
return false;
}