<!--
var error_flag = false;

function validateField( field, fieldType ) {

	var objRegExp;
	var message;
	
	//Check for value
	if (field.value.length!=0) {
	
		switch( fieldType ) {
			
			case "email":
				objRegExp = /^[a-z0-9]([a-z0-9_\-\.]*)@([a-z0-9_\-\.]*)(\.[a-z]{2,3}(\.[a-z]{2}){0,2})$/i;
				message = "Please enter a valid email address.     ";
			break;
			case "zip":
				objRegExp  = /(^\d{5}$)|(^\d{5}-\d{4}$)/;
				message = "Please enter a valid zip code.     ";
			break;
		}
		if (!objRegExp.test(field.value)) {
			alert(message);
			field.focus();
			error_flag = true;								
			return false;
		}
	}
}