// this array consists of the id attributes of the divs we wish to alternate between
var divs_to_fade = new Array('box-1', 'box-2', 'box-3', 'box-4');

// the starting index in the above array.
// It should be set to the value of the div which doesnt
// have the CSS Display property set to none
var i = 0;

// the number of milliseconds between swaps.  Default is five seconds.
var wait = 5000;

// the function that performs the fade
function swapFade()
{
	Effect.Fade(divs_to_fade[i], { duration:1, from:1.0, to:0.0 });
	i++;
	if (i == 4) i = 0;
	Effect.Appear(divs_to_fade[i], { duration:1, from:0.0, to:1.0 });
}

// the onload event handler that starts the fading.
function startPage()
{
	setInterval('swapFade()',wait);
}

function getQueryVariable(variable)
{
  var query = window.location.search.substring(1);
  var vars = query.split("&");

  for (var i=0;i<vars.length;i++) {
    var pair = vars[i].split("=");

    if (pair[0] == variable) {
      return pair[1];
    }
  }

  return(null);
}