function isAlphaNumeric(Input) 
{
	var numbers="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_";
	var CharacterCheck;
	var counter = 0; 

	for (var i=0; i < Input.length; i++)
	{
		CharacterCheck = Input.substring(i, i+1); 
		if (numbers.indexOf(CharacterCheck) != -1)
		{
			counter ++;
		}

	}
	if (counter != Input.length)
	{
		return true;
	}
	return false;
}

// This function is used to validate an email address 

function isEmailAddr(email)
{
  var result = false
  var theStr = new String(email)
  var index = theStr.indexOf("@");
  if (index > 0)
  {
    var pindex = theStr.indexOf(".",index);
    if ((pindex > index+1) && (theStr.length > pindex+1))
	result = true;
  }
  return result;
}