function validateEmailv2(email)
	{
		// a very simple email validation checking. 
		// you can add more complex email checking if it helps 
	    if(email.length <= 0)
		{
		  return true;
		}
	    var splitted = email.match("^(.+)@(.+)$");
    	if(splitted == null) return false;
	    if(splitted[1] != null )
    	{
	      var regexp_user=/^\"?[\w-_\.]*\"?$/;
    	  if(splitted[1].match(regexp_user) == null) return false;
	    }
    	if(splitted[2] != null)
	    {
    	  var regexp_domain=/^[\w-\.]*\.[A-Za-z]{2,4}$/;
	      if(splitted[2].match(regexp_domain) == null) 
    	  {
	    	var regexp_ip =/^\[\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\]$/;
		    if(splitted[2].match(regexp_ip) == null) return false;
      	}// if
	      return true;
    	}
		return false;
	}