var shipping_window = null;
function ViewShipping(store_code, cat_code, prod_code) {
	var win_height = 350;
	var win_width = 400;
	var win_top = (screen.height / 2) - (win_height / 2);
	var win_left = (screen.width / 2) - (win_width / 2);
	var bWinClosed = true;
	if (shipping_window != null) {
		bWinClosed = shipping_window.closed;
	}
	if (bWinClosed) { 	
		var sURL = 	"http://www.waynebuilt.com/Merchant2/merchant.mv?Screen=ENTER_ZIP&Store_Code="+ store_code +"&Category_Code="+ cat_code +"&Product_Code="+ prod_code;
		var sOptions = "scrollbars=yes,resizable=no,width="+ win_width +",height="+ win_height +",left="+ win_left +",top="+ win_top;
		shipping_window = window.open(sURL, "displayWindow", sOptions);		
	}	
	else {
		shipping_window.focus();
	}
}