function openSlideShow(num,siteid,url) {
	if(siteid==null) {
		siteid = 'null';
	}
	if(url==null) {
		url="slides.html";
	}
	document.slideshow.start.value=num;
	dummy = open(url,siteid,'status=no,location=no,toolbar=no,directories=no,width=640,height=480');
	return true;
}