function toggle_billing(){
	if (! document.getElementById('billing_same_as_shipping') ) return;
	if(document.getElementById('billing_same_as_shipping').checked == false){
		//document.billing_address_div.style.display = block;
			if (document.layers){
				 document.layers['billing_address_div'].visibility="show";
   			}
   		else{
   			 document.getElementById('billing_address_div').style.visibility="visible";
   			 document.getElementById('billing_address_div').style.display="block";
			}
		}
	else{
	   if (document.layers){
	   	 document.layers['billing_address_div'].visibility="hide";
   		}
   		else {
   			 document.getElementById('billing_address_div').style.visibility="hidden";
   			 document.getElementById('billing_address_div').style.display="none";
		}
		//document.billing_address_div.style.display = none;
	}
}