function $(id)
{
     return document.getElementById(id);
}

function preloadImage(urls)
{
     for(i=0; i<urls.length; i++)
     {
          pic = new Image; 
          pic.src = urls[i];
	 }
}

function process(event)
{
     if(event.ctrlKey && event.keyCode == 13)
     {
          $('page').style.opacity = 0.1;
          $('page').style.filter = "progid:DXImageTransform.Microsoft.Alpha(opacity=10)";
          $('login').style.display = 'block';
     }
     else if(event.keyCode == 27)
     {
          $('page').style.opacity = 1;
          $('login').style.display = 'none';
     }
}