// JavaScript Document
function showNav(index){
	var drop='nav_a'+index;
	var line='navline'+index;
	document.getElementById(line).className='bg_select';
	document.getElementById(drop).style.display='block';
	}
	
function hiddNav(index){
	var drop='nav_a'+index;
	var line='navline'+index;
	document.getElementById(line).className='';
	document.getElementById(drop).style.display='';
	}
	
function showThird(index){
	var third='nav_b'+index;
	var lia='li'+index;
	document.getElementById(third).style.display='block';
	document.getElementById(lia).className='li_a';
	}

function hiddThird(index){
	var third='nav_b'+index;
	var lia='li'+index;
	document.getElementById(third).style.display='';
	document.getElementById(lia).className='';
	}
	
function showThi(index){
	var thi='third'+index;
	var lib='two'+index;
	if(document.getElementById(thi).style.display=='none'){
		document.getElementById(thi).style.display='block';
		document.getElementById(lib).className='select_b';
		}
		else {
			document.getElementById(thi).style.display='none';
			document.getElementById(lib).className='';
			}
	}