function init() {
	autoAdvance = window.setInterval('advanceHl()',3700);
}
function advanceHl() {
	nextHl++;
	if (nextHl==numItems) nextHl=0;
	goToHl(nextHl);
	setHlDesc(arrDesc[nextHl])
}
function clickHl(num) {
	window.clearInterval(autoAdvance);
	goToHl(num);
	return false;
}
function goToHl(num) {
	// deselect all highlights
	for(var i=0;i<numItems;i++) {
		document.getElementById('hlImg'+i).style.display='none';
		document.getElementById('hlImgText'+i).style.display='none';
		document.getElementById('hlNum'+i).className='';
	}
	// select our highlight
	document.getElementById('hlImg'+num).style.display='';
	document.getElementById('hlImgText'+num).style.display='';
	document.getElementById('hlNum'+num).className='hl';
	nextHl = num;
}
function setHlDesc(txt) {
	document.getElementById('hlDesc').innerHTML = txt;
}
function goTo(url) {
	location.href=url;
}