// JavaScript Document
function getid(id){return document.getElementById(id);}
function gettag(tag,obj){if(obj){return obj.getElementsByTagName(tag)}else{return document.getElementsByTagName(tag)}}
function addLoadEvent(func){var oldonload=window.onload;if(typeof window.onload!="function"){window.onload=func;}else{window.onload=function(){oldonload();func();}};}
function init_menu(){
	var nav=getid("nav_menu");
	var li=gettag("li",nav);
	for(var i=0;i<li.length;i++){
		li[i].index=i;
		if(li[i].parentNode!=nav){continue;}
		li[i].onmouseover=function(){if(this.index<3){if(this.className.indexOf("show")<0){this.className+=" show";}}else{if(this.className.indexOf("rshow")<0){this.className+=" rshow";}};}
		li[i].onmouseout=function(){this.className=this.className.replace("rshow","");this.className=this.className.replace("show","");}
	}
}
addLoadEvent(init_menu);