// up is pointer to slideNo, cycles 0 thru 5
var up = 0;

function toggle_visibility(id) {
   var e = document.getElementById(id);
   if(e.style.display== 'block') {
//     e.style.display = 'none';
	   vis_OFF(id);
   	   vis_ON('advert');
   	   vis_ON('advert1');
   }
   else
//      e.style.display= 'block';
	   vis_ON(id);
}

function vis_ON(id) {
	var e = document.getElementById(id);
	e.style.display = "block";
}

function vis_OFF(id) {
	var e = document.getElementById(id);
	e.style.display = "none";
}

function show_slide(evPtr) {
	var slideNo;
	if (evPtr > 0) {
		slideNo = evElst[evPtr];		
	} else slideNo = 0;
	urlStr = "wp-includes/js/webinar/slides/Intro/img" + slideNo + ".html";
	document.getElementById("brief").src = urlStr;
}

// Cycle doit through slides 0-5
function show_nextSlide() {
	up++;
	if (up > (evElst.length-2)) up = 0;
	show_slide(up);
}

function init_slideShow() {
//	vis_OFF('pop');
	// 5 slides in show, numbered 0-5
	/*
	 * 
	for(var i=0; i<=evElst.length; i++) {
		urlStr = "wp-includes/js/webinar/slides/Intro/img" + i + ".html";
		document.getElementById("brief").src = urlStr;
	}
	 */
	up = 0;
	show_slide(up);
}

function download_Brief() {
	window.open("wp-includes/js/webinar/media/Introduction.pdf","brief","width=500,height=400,toolbar=no,status=no,scrollbars=no");
}

function preload_Brief(id) {
	updateHTML("datum","preload_Brief("+id+")");
	var ifrStr;
	for (var i=0;i<=evElst.length-2;i++) {
		ifrStr = "<iframe class='preload' src='wp-includes/js/webinar/slides/Intro/img"+i+".html'></iframe>";
		document.writeln(ifrStr);
		updateHTML("datum","img"+i+".html");
	}
}

function flagOFF() {
	document.getElementById("flag").setAttribute("class","flag_dot");
}