// JavaScript Document

function tabshow(num){
	//var title=document.getElementById(obj);
	
	var strlength=document.getElementById('tab_title').getElementsByTagName('a').length;
    for(var i=0;i<strlength;i++){
		document.getElementById('title'+i).className="";
		document.getElementById('box'+i).style.display="none";
		}
		document.getElementById('title'+num).className="current";
		document.getElementById('box'+num).style.display="block";
	
	}