var idx = 0;
var ifirst = 1;

var link = new Array(
	"http://www.bard.edu",
	"http://www.culturaltourconsultants.com",
	"http://www.musicalsource.com",
	"http://www.loyola.edu/kodaly",
	"http://www.messiah.edu/conducting"

);

var pic = new Array(
	"ads/Bard.jpg",
	"ads/Cultural_Tour.jpg",
	"ads/MusicalSource.jpg",
	"ads/LoyolaUniv.jpg",
	"ads/Messiah.jpg"
);

var text = new Array(
	"Bard College",
	"Cultural Tour",
	"The Musical Source",
	"Loyola University Maryland",
	"Messiah College"
);

function preload_images() {
	var preLoad = new Array();
	for (i = 0; i < pic.length; i++){
		preLoad[i] = new Image(134,230);
		preLoad[i].src = pic[i];
	}
}

function rotate() {
	if (ifirst == 1){
		idx=Math.floor(Math.random()*pic.length)
	}
	var idxlink = link[idx];
	var idxpic = pic[idx];
	var idxtext  = text[idx];
	var	pixwid = 134;
	var	pixht = 230;
	var content = '<a href=\"'+idxlink+'\"><image src=\"'+idxpic+'\" title=\"'+idxtext+'\" alt=\"'+idxtext+'\" width=\"'+pixwid+'\" height=\"'+pixht+'\"></a>';
	document.getElementById('ad').innerHTML = content;
	idx++;
	if(idx > pic.length-1){idx=0;}
	ifirst++;
	setTimeout("rotate()", 5000);
}