// JavaScript Document
window.onload = function() {
	var lis = document.getElementById("nav").getElementsByTagName("li");
	for(var i=0; i<lis.length; i++){
		lis[i].onmouseover=function(){	
			if(this.getElementsByTagName('li').length >0)
			{
				this.className+=(this.className.length>0?" ":"") + "show";
			}
		}
		lis[i].onmouseout=function(){
			this.className=this.className.replace(new RegExp("( ?|^)show\\b"), "");
		}
	}
}

 function show(num){
 	var lis = document.getElementById('title').getElementsByTagName('li');
	for(i=0;i<lis.length;i++){
		lis[i].className = '';
		document.getElementById('con'+(i+1)).style.display = 'none';
	}
	document.getElementById('tit'+num).className = 'current';
	document.getElementById('con'+num).style.display = 'block';
 }