var emailLemmor=/^\w+[\+\.\w-]*@([\w-]+\.)*\w+[\w-]*\.([a-z]{2,3}|\d+)$/i 
function validateEmail( e ){  var validEmail = emailLemmor.test( e.value ) 
 if( !validEmail )  { 
 alert( "Please enter a valid email address." );   
  e.select()  } 
   return validEmail;}