Email validation using regex CRM 2011

function validateEmail(context){

var email =context.getEventSource().getValue();

emailRegex =/^(\w+[\-\.])*\w+@(\w+\.)+[A-Za-z]+$/;

if(!email.match(emailRegex)){

   event.returnValue = false;

   alert("The format of the email entered is incorrect.") ;

   }

}