<!-- hide from JavaScript-challenged browsers
var LessonWindow;
function popUp(URL,windowName,w,h,scrolls) {
if(!LessonWindow || LessonWindow.closed){
LessonWindow = window.open(URL, windowName, 'toolbar=0,scrollbars=' + scrolls + ',location=0,statusbar=0,menubar=0,resizable=1,width=' + w + ',height=' + h + ',left=20,top=20');
} else {
LessonWindow = window.open(URL, windowName, 'toolbar=0,scrollbars=0,location=0,statusbar=0,menubar=0,resizable=1,width=' + w + ',height=' + h + ',left=20,top=20');
LessonWindow.focus();
}
}
// End -->