function popWin(loc,w,h,format) {
	if (!w || w == 0) {
		w = 800;
	} 
	if (!h || h == 0) {
		h = 600;
	} 
	
	var stat = 'no';
	var reSize = 'yes';
	var scroll = 'no';
	var tools = 'no';
	var locvar = 'no';
	if (format == 'PDF') {
		scroll = 'yes';
	} else if (format == 'Gloss') {
		scroll = 'yes';
	}

	pwin = window.open(loc,'pop','width='+w+',height='+h+',toolbar='+tools+',status='+stat+',scrollbars='+scroll+',resizable='+reSize+',location='+locvar+',menubar=no,directories=no');
	pwin.focus();

}

function goToSession() {
	var f = document.jumpNav;
	var sesNum = f.session.options[f.session.options.selectedIndex].value;
	if (!sesNum || sesNum == 0) {
		return false;
	}
	url = "/workshops/teachreading35/session" + sesNum + "/index.html";
	location.href = url;
}

function goToClassroom() {
	var f = document.jumpNav;
	var val = f.session.options[f.session.options.selectedIndex].value;
	if (!val || val == 0 || val == 'null') {
		return false;
	}
	url = val;
	location.href = url;
}


function imgOn(imgName) {
	if (document.images) {
     		 onImage = eval(imgName + "on.src");
     		 document[imgName].src = onImage;
    	}
 }

function imgOff(imgName) {
   	if (document.images) {
    		  offImage = eval(imgName + "off.src");
     		  document[imgName].src = offImage;
   	 }
 }