function ajaxInit() 
{
	var req;
	try 
	{
		req = new ActiveXObject("Microsoft.XMLHTTP");
	}
	catch(e) 
	{
		try 
		{
			req = new ActiveXObject("Msxml2.XMLHTTP");
		}
		catch(ex) 
		{
			try 
			{
				req = new XMLHttpRequest();
			}
			catch(exc) 
			{
				alert("Esse browser n� tem recursos para uso do Ajax");
				req = null;
			}
		}
	}
	return req;
}

		
function atualiza_pagina ( url ) 
{
	var ajax = ajaxInit();
	ajax.open("GET", url );
	ajax.onreadystatechange = function() 
	{
		if(ajax.readyState == 1) 
		{
			document.getElementById('loading').innerHTML = "<img src='images/loading_verde.gif'>"; 
		}
		if(ajax.readyState == 4) 
		{
			if(ajax.status == 200) 
			{
				var retorno = ajax.responseText;
				document.getElementById('content').innerHTML = retorno;
				document.getElementById('loading').innerHTML = "";						
			}
		}
	}
	ajax.send(null); 
}
		
function submete_dados ( params , url , flag )
{
	var ajax = ajaxInit();
	ajax.open("GET", url + params );
	
	ajax.onreadystatechange = function() 
	{
		if(ajax.readyState == 1) 
		{
			document.getElementById('loading').innerHTML = "<img src='images/loading_verde.gif'>";
			
		}
		if(ajax.readyState == 4) 
		{
			if(ajax.status == 200) 
			{
				var retorno = ajax.responseText;
				if(flag == 'login')
				{
					if(retorno == 'true')
					{
						document.getElementById('caixa_login').innerHTML = "<p><b>Ol&aacute; Administrador,</b></p>";
						document.getElementById('caixa_logout').innerHTML = "<a onclick='javascript:logout();'><b>logout</b></a>";
						document.getElementById('loading').innerHTML = "";
						window.location = "index.php";
					}
					else
					{	
						document.getElementById('caixa_logout').innerHTML = "<b style='color:red;'>invalid login</b>";
						document.getElementById('loading').innerHTML = "";							
					}
	
				}
				else if (flag == 'logout')
				{
					document.getElementById('caixa_login').innerHTML = "<table><tr><td><p><b>Login:</b></p></td><td><input type='text' id='login' class='input' name='login' style='font-weight:bold;' /></td>"+
					"<td><p><b>Password:</b></p></td><td><input type='password' id='pass' class='input' name='pass' style='font-weight:bold;'  /></td>"+
					"<td><input name='enviar' type='button' class='botao' value='ok' onclick='javascript:login();'></td></tr></table>";
					document.getElementById('caixa_logout').innerHTML = "";
					document.getElementById('loading').innerHTML = "";						
				}	
			}
		}
	}
	/*
	try
	{
	}
	catch( e )
	{
		alert("Exception in CMPD2, please press F5 to refresh the page; error: " + e.description);
	}
	*/

	ajax.send(null); 
}
		
function login ()
{
	var login = document.getElementById('login').value;
	var senha = document.getElementById('pass').value;
	var url = "admin/shared/autenticacao.rotinas.php";
	submete_dados("?login=" + login + "&senha=" + senha , url , 'login');
}

function logout ()
{
	var url = "admin/shared/common.logout.php";
	submete_dados("" , url , 'logout');
}