var theImages = new Array();
	theImages[0] = 'rand0.jpg';
	theImages[1] = 'rand1.jpg';
	theImages[2] = 'rand2.jpg';
	theImages[3] = 'rand3.jpg';
	
	var theAlts = new Array();
	theAlts[0] = 'phone call';
	theAlts[1] = 'chart';
	theAlts[2] = 'dialing';
	theAlts[3] = 'wireless';

	var j = 0;
	var imsLength = theImages.length;
	var preBuffer = new Array();
	
	for (i = 0; i < imsLength; i++){
	   preBuffer[i] = new Image();
	   preBuffer[i].src = theImages[i];
	}
	var whichImage = Math.round(Math.random()*(imsLength-1));
	
	function showImage(){
		document.write('<img src="images/random/' + theImages[whichImage] + '" alt="' + theAlts[whichImage] + '" width="277" height="100"/>');
	}