function isFieldEmpty(psCaption, pField) {
	if (pField.value=="") {
		alert(psCaption + " must have a value, please fill this field first.");
		pField.focus();
		return false;
	} else 
		return true;
} 


function isFieldEmailAddress(poField, psCaption) {
	re = /.+@.+\..+/ ;
							
	if (!re.test(poField.value)) {
		alert(psCaption);
		poField.focus();
		return false;
	} else
		return true;
}