function trim(stringToTrim) {
	return stringToTrim.replace(/^\s+|\s+$/g,"");
}
function validate_required(field,alerttxt) {
	with (field) {
		strvalue=trim(value);
		if (strvalue==null||strvalue=="") {alert(alerttxt);return false;} else {return true}
	}
}
function validate_email(field,alerttxt) {
	with (field) {
		apos=value.indexOf("@");
		dotpos=value.lastIndexOf(".");
		if (apos<1||dotpos-apos<2) {alert(alerttxt);return false;} else {return true;}
	}
}