function isEmail(formObj) 
{
	var email = formObj.value;
	var pattern = /^([0-9a-zA-Z]+)([._-]([0-9a-zA-Z]+))*[@]([0-9a-zA-Z]+)([._-]([0-9a-zA-Z]+))*[.]([0-9a-zA-Z]){2}([0-9a-zA-Z])?$/;
	valid = pattern.test(email);

	if(valid)
	{
		return true;
	}
	else
	{
		return false;
	}
}