add:  if (!ControlToValidate) { ValidatorSucceeded (validator); return true; }  
context: function CustomValidatorEvaluateIsValid (validator){	var InitialValue = validator.getAttribute ("initialvalue");	var ControlToValidate = validator.getAttribute ("controltovalidate");	var evaluationfunc = validator.getAttribute ("clientvalidationfunction");	var ctrl_value = ValidatorTrim (ValidatorGetValue (ControlToValidate));	var result = true;	if (evaluationfunc && evaluationfunc != "") {		args = {Value:ctrl_value, IsValid:false};		eval (evaluationfunc + "(validator, args)");		result = args.IsValid;	}	if (result) {		ValidatorSucceeded (validator);		return true;	}	else {		ValidatorFailed (validator);		return false;	}}
meta: 7338	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/7338/52a9784f641775476c7443c954fc0d691838b1ea/WebUIValidation.js/clean/mcs/class/System.Web/resources/WebUIValidation.js