function validemail(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;
}

function isLetters(c)
{     return (((c >= "a") && (c <= "z"))||((c >= "A") && (c <= "Z")) ||(c==" "));
}//end of function

function isAlphabet (str,msg)
{
	for(var i=0; i<str.length; i++)
	{
		var c = str.charAt(i);
		if(!isLetters(c))
		{
			alert("Enter Only Alphabets for " + msg);
			return false;
		}
	}
	return true;
}