function win_open(address,name,width,height)
{
if(address!='#')
window.open(address,name,"width="+width+",height="+height+",scrollbars=0,resizable=0,top=0,left=0,toolbar=0,status=0")
}

var last_div='bar'
function chng_div(new_one)
{	
	document.getElementById(last_div).style.visibility = "hidden";
	document.getElementById(new_one).style.visibility = "visible";		
	last_div=new_one
}