// JavaScript Document
function checkFriend()
{ 
	message = '';
	if(document.friendform.referer.value=='')
	{
		message += "Please enter your name\n";
	}
	if(document.friendform.referee.value=='')
	{
		message += "Please enter your friends name\n";
	}

	// get the position of the '@' symbol, '.' symbol and
	// the last character to get a 'fairly' valid email address
	at_pos = document.friendform.email.value.indexOf("@");
	dot_pos = document.friendform.email.value.indexOf(".");
	last_pos = document.friendform.email.value.length-1;

	// Check the User has entered a valid email address
	if((document.friendform.email.value=="")||(at_pos<1||last_pos-at_pos<5||dot_pos<1||last_pos-dot_pos<2))
	{
		message += "Please enter a valid email address\n";
	} 

	if(message!='')
	{
		alert(message);
		return false;
	} else {
		return true;
	}
}