function displayClass(){
	// Set up the image files to be used.
	var theClasses = new Array()
	theClasses[0] = 'headerAPhotoA'
	theClasses[1] = 'headerAPhotoB'
	theClasses[2] = 'headerAPhotoC'
	// do not edit anything below this line
	var j = 0
	var p = theClasses.length;
	var preBuffer = new Array()
	for (i = 0; i < p; i++){
	   preBuffer[i] = new Image()
	   preBuffer[i].src = theClasses[i]
	}
	var whichClass = Math.round(Math.random()*(p-1));
	document.write('<div id="headerA" class="'+theClasses[whichClass]+'">');
}