var SlideNum = 0;
var CurrentSlideNum = 0;

var TopicNum = 0;
var CurrentTopicNum = 0;

if (window.bHasWMP7) {
	playerVersion = "7";
} else {
	playerVersion = "below7";
}

function ShowSlide(slide_num) {
	if (CurrentSlideNum != slide_num) {
	    document.slide_img.src = slideLocation + Slide[slide_num];
	}
        CurrentSlideNum = slide_num;
}

function ShowTopic(topic_num) {
	if (CurrentTopicNum != topic_num) {
	    document.topic_form.topic_select.options[topic_num - 1].selected = true;
	}
	CurrentTopicNum = topic_num;
}

function SeekToTopic(topic_num) {
	if (navigator.userAgent.indexOf("MSIE") != -1) {
	    if (window.bHasWMP7) {
		MediaPlayer1.controls.currentPosition = rTopicTime[topic_num];
	    } else {
		MediaPlayer1.CurrentPosition = rTopicTime[topic_num];
	    }
	} else {
	    document.MediaPlayer1.SetCurrentPosition(rTopicTime[topic_num]);
	}
}

function SynEngine() {
	if (navigator.userAgent.indexOf("MSIE") != -1) {
	    if (window.bHasWMP7) {
		position = MediaPlayer1.controls.currentPosition;
	    } else {
		position = MediaPlayer1.CurrentPosition;
	    }
	} else {
	    position = document.MediaPlayer1.GetCurrentPosition();
	}
	for (i = 1; i <= NumOfSlides; i++) {
	    if (position >= rSlideTime[i]) {
		SlideNum = i;
	    }
	}
	for (j = 1; j <= NumOfTopics; j++) {
	    if (position >= rTopicTime[j]) {
		TopicNum = j;
	    }
	}
	ShowSlide(SlideNum);
	ShowTopic(TopicNum);
	setTimeout("SynEngine()", 1000);
}