/*******************************************************
 * 
 * Package: 		Conference registration software
 * Filename:		login_control.js
 * Date Written:	September 6, 2007
 * Last Updated:	September 6, 2007
 * Author:			John George
 * Abstract:		Contains javascript for login purposes
 * 
 * @author John George <johnkg77@usa.net>
 * @copyright Copyright (c) 2007 John George
 * @version 0.1
 * 
 *******************************************************/
 
//function used during the login screen to display different login methods depending
//on the method selected by the user
function showLoginMenu(selected)
{
	if (selected == 'username')
	{
		document.getElementById('username').style.display = '';
		document.getElementById('email').style.display = 'none';
		document.getElementById('serialnum').style.display = 'none';
	}
	
	if (selected == 'email')
	{
		document.getElementById('username').style.display = 'none';
		document.getElementById('email').style.display = '';
		document.getElementById('serialnum').style.display = 'none';
	}
	if (selected == 'serial-num')
	{
		document.getElementById('username').style.display = 'none';
		document.getElementById('email').style.display = 'none';
		document.getElementById('serialnum').style.display = '';
	}
}

//function to show the instruction or hide it
function showInstr()
{
    var current_stat = document.getElementById('instruction').style.display;

    if (current_stat == 'none')
    {
        document.getElementById('instruction').style.display = 'block';
    }
    else
    {
        document.getElementById('instruction').style.display = 'none';
    }
}