//=======================================================================================================
// GERENCIADOR DE COOKIES :::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
//=======================================================================================================

// CRIAR COOKIE
//-----------------------------------
// Cookie até fechar o navegador
// set_cookie ( "username", "John Smith" );
//
// Cookie com data:
// set_cookie ( "username", "John Smith", 2003, 01, 15 );
// 
// Cookie amarrado com um domínio
// set_cookie ( "username", "John Smith", 2003, 01, 15, "", "elated.com", "secure" );

function set_cookie ( name, value, exp_y, exp_m, exp_d, path, domain, secure )
{
  var cookie_string = name + "=" + escape ( value );

  if ( exp_y )
  {
    var expires = new Date ( exp_y, exp_m, exp_d );
    cookie_string += "; expires=" + expires.toGMTString();
  }

  if ( path )
        cookie_string += "; path=" + escape ( path );

  if ( domain )
        cookie_string += "; domain=" + escape ( domain );
  
  if ( secure )
        cookie_string += "; secure";
  
  document.cookie = cookie_string;
}



// FUNÇAO PARA DELETAR COOKIE
//-----------------------------------
//
// Exemplo para remover cookie
// delete_cookie ( "username" );

function delete_cookie ( cookie_name )
{
  var cookie_date = new Date ( );  // current date & time
  cookie_date.setTime ( cookie_date.getTime() - 1 );
  document.cookie = cookie_name += "=; expires=" + cookie_date.toGMTString();
}



// FUNÇAO PARA RECUPERAR COOKIE
//------------------------------------
function get_cookie ( cookie_name )
{
  var results = document.cookie.match ( '(^|;) ?' + cookie_name + '=([^;]*)(;|$)' );

  if ( results )
    return ( unescape ( results[2] ) );
  else
    return null;
}




//================================================================================
// EXEMPLO DE USO DO CÓDIGO
//================================================================================
//  if ( ! get_cookie ( "username" ) )
//	{
//	  var username = prompt ( "Please enter your name", "" );
//	
//	  if ( username )
//	  {
//		var current_date = new Date;
//		var cookie_year = current_date.getFullYear ( ) + 1;
//		var cookie_month = current_date.getMonth ( );
//		var cookie_day = current_date.getDate ( );
//		set_cookie ( "username", username, cookie_year, cookie_month, cookie_day );
//	  }
//	}
//	else
//	{
//	  var username = get_cookie ( "username" );
//	  document.write ( "Hi " + username + ", welcome to my website!" );
//	  document.write ( "<br><a href=\"javascript:delete_cookie('username');
//						document.location.reload ( );\">
//						Forget about me!</a>" );
//	}