function CheckEmail(){
   email=document.getElementById("email");

  _RegExp = /^([a-z0-9_-]+[\.]?)*[a-z0-9_-]+@([a-z0-9_-]+[\.]?)*([a-z0-9_-]+)\.[a-z0-9]+$/i;

  if( _RegExp.test(email.value) == false ){
    alert("Incorrect Email. Try again.");
    return false;
  }
  else{
    return true;
  }


}