function swapDiv( objectId ) 
{
  var styleObject = getStyleObject(objectId);
  if( styleObject )
  { 
    if( window.currentlyVisibleSwapDiv ) 
    {
      changeObjectDisplay( window.currentlyVisibleSwapDiv, 'none' );
      window.currentlyVisibleSwapDiv = false;
    }

    styleObject.display = 'block';
    window.currentlyVisibleSwapDiv = objectId;
    return true;
  }
  return false; 
}

function setupAutoSwapDiv( idPrefix, count )
{
  window.autoSwapDivOff    = 0;
  window.autoSwapDivPrefix = idPrefix;
  window.autoSwapDivIndex  = 1;
  window.autoSwapDivCount  = count;
  var objectId = window.autoSwapDivPrefix + window.autoSwapDivIndex;
  swapDiv( objectId );
  setTimeout('doAutoSwapDiv()', 2000);
}

function doAutoSwapDiv()
{
   if( window.autoSwapDivOff == 1 )
     return;   
   var objectId = window.autoSwapDivPrefix + window.autoSwapDivIndex;
   if( window.autoSwapDivIndex == window.autoSwapDivCount )
     window.autoSwapDivIndex = 1;
   else
     window.autoSwapDivIndex++;
   swapDiv( objectId );
   setTimeout('doAutoSwapDiv()', 2000);
}

function swapDivStop( objectId )
{
   window.autoSwapDivOff = 1;
   swapDiv( objectId );
}

function swapDivStart()
{
   window.autoSwapDivOff = 0;
   doAutoSwapDiv();
}