function checkbae(form){
	if (document.layers||document.getElementById||document.all)
		return checkemail(form);
	else
	return true;
}


function checkemail(form){
	var str=form.elements['postcode'].value;
	var filter=/^[A-Z][A-Z]?[0-9][A-Z0-9]? ?[0-9][ABDEFGHJLNPQRSTUWXYZ]{2}$/i
	
			if (filter.test(str))
				testresults = true;
			else {
				alert("Please supply a postcode so that we know the general area from which the feedback originates.")
				form.elements['postcode'].style.borderColor = "#ff0000";
				form.elements['postcode'].focus();
				testresults = false;
			}
			
	return (testresults)
}