//function to get data from form
function addProduct (super_product_id) {
	
	//extract data from form
	var frm = eval('document.frmBuyProduct_' + super_product_id);
	
	//window.alert(frm.product_line_id.value + ' - ' + frm.super_product_id.value + ' - ' + frm.is_multiple.value);
	
	//check for selectable attributes
	if (frm.is_multiple.value == 1) {
		
		frm.product_id.value = frm.select_attribute[frm.select_attribute.selectedIndex].value;
		
		//if selection not made then don't submit form
		if (frm.product_id.value == 'null') {
			window.alert ('Please select required ' + frm.attribute_group_name.value);
			return
		}
		
	}
	
	//window.alert(frm.product_line_id.value + ' - ' + frm.super_product_id.value + ' - ' + frm.product_id.value);
	frm.submit();
	
}