<!--- This function checks for validity of Email ID. --->

function isEmail (SEmail)

{  

	var emailPattern = /^[\-_a-zA-Z0-9]+(\.[\-_a-zA-Z0-9]+)*\@[\-_a-zA-Z0-9]+\.[\-_a-zA-Z0-9]+(\.[\-_a-zA-Z0-9]+)*$/;



	if(SEmail != null)

	{

		return emailPattern.test(SEmail);

	}	

	else

	{

		return SEmail;

	}

}