/****************** Contact us  ****************/
/******************* checking for empty string  *****************/
function isEmpty(s)
{   return ((s == null) || (s.length == 0))
}

/******************* (end) checking for empty string *****************/

/******************* checking for white space  *****************/

var whitespace = " \t\n\r";
function isWhitespace (s)
{ var i;
   if (isEmpty(s)) return true;
   for (i = 0; i < s.length; i++)
    {
    var c = s.charAt(i);
   if (whitespace.indexOf(c) == -1) return false;
   }
  return true;
}
/******************* (end) checking for white space  *****************/

function send_to_a_friend_validation()

{

	if (isWhitespace(document.send_to_a_friend_form.friends_name.value))
	{
		alert('Friends name is mandatory.');
		document.send_to_a_friend_form.friends_name.focus();		
		return false;
	}

	if (isWhitespace(document.send_to_a_friend_form.friends_email_address.value))
	{
		alert('Friends email address is mandatory.');
		document.send_to_a_friend_form.friends_email_address.focus();		
		return false;
	}

	if ((document.send_to_a_friend_form.friends_email_address.value) != '')
	{
		check_mail=document.send_to_a_friend_form.friends_email_address.value;
		if ((check_mail.indexOf('@', 0) == -1) || (check_mail.indexOf('.', 0) == -1) )
		{
			alert("Not a  valid e-mail address!");
			document.send_to_a_friend_form.friends_email_address.focus();
			return false;
		}	
	}
	
	if (isWhitespace(document.send_to_a_friend_form.your_name.value))
	{
		alert('Your name is mandatory.');
		document.send_to_a_friend_form.your_name.focus();		
		return false;
	}
	
	if (isWhitespace(document.send_to_a_friend_form.your_email_address.value))
	{
		alert('Your email address is mandatory.');
		document.send_to_a_friend_form.your_email_address.focus();		
		return false;
	}
		
	if ((document.send_to_a_friend_form.your_email_address.value) != '')
	{
		check_mail=document.send_to_a_friend_form.your_email_address.value;
		if ((check_mail.indexOf('@', 0) == -1) || (check_mail.indexOf('.', 0) == -1) )
		{
			alert("Not a  valid e-mail address!");
			document.send_to_a_friend_form.your_email_address.focus();
			return false;
		}	
	}

}