function showlayer(id,index)
{
	eval("document.getElementById('tab"+"_"+id+"').className='active'");
	eval("document.getElementById('tab"+"_"+index+"').className='normal'");
	eval("document.getElementById('layer"+"_"+id+"').style.display='block'");
	eval("document.getElementById('layer"+"_"+index+"').style.display='none'");
}
function showlayer2(id)
{
	for (i=3;i<7;i++)
	{
		eval("document.getElementById('tab"+"_"+i+"').className='normal'");
		eval("document.getElementById('layer"+"_"+i+"').style.display='none'");
	}
	eval("document.getElementById('tab"+"_"+id+"').className='active'");
	eval("document.getElementById('layer"+"_"+id+"').style.display='block'");
	
}