DHTML:预加载图片轮显

DHTML:预加载图片轮显 - 电脑技巧 - 电脑教程网

DHTML:预加载图片轮显

日期:2006-11-18   荐:
<Html><head>
<script language="javascript">

//Preloaded slideshow script- By Jason Moon
//For this script and more
//Visit <a href="http://www.dynamicdrive.com" target="_blank">http://www.dynamicdrive.com</a>

// PUT THE URL'S OF YOUR IMAGES INTO THIS ARRAY...
var Slides = new Array('attachments/month_054/poster_50first_dates.jpg','attachments/month_054/poster_snickets.jpg','attachments/month_054/poster_she_s_french.jpg');

// DO NOT EDIT BELOW THIS LINE!
function CacheImage(ImageSource) { // TURNS THE STRING INTO AN IMAGE OBJECT
var ImageObject = new Image();
ImageObject.src = ImageSource;
return ImageObject;
}

function ShowSlide(Direction) {
if (SlideReady) {
NextSlide = CurrentSlide + Direction;
// THIS WILL DISABLE THE BUTTONS (IE-ONLY)
document.SlideShow.Previous.disabled = (NextSlide == 0);
document.SlideShow.Next.disabled = (NextSlide ==
(Slides.length-1));
if ((NextSlide >= 0) && (NextSlide < Slides.length)) {
document.images['Screen'].src = Slides[NextSlide].src;
CurrentSlide = NextSlide++;
Message = 'Picture ' + (CurrentSlide+1) + ' of ' +
Slides.length;
self.defaultStatus = Message;
if (Direction == 1) CacheNextSlide();
}
return true;
}
}

function Download() {
if (Slides[NextSlide].complete) {
SlideReady = true;
self.defaultStatus = Message;
}
else setTimeout("Download()", 100); // CHECKS DOWNLOAD STATUS EVERY 100 MS
return true;
}

function CacheNextSlide() {
if ((NextSlide < Slides.length) && (typeof Slides[NextSlide] ==
'string'))
{ // ONLY CACHES THE IMAGES ONCE
SlideReady = false;
self.defaultStatus = 'Downloading next picture...';
Slides[NextSlide] = CacheImage(Slides[NextSlide]);
Download();
}
return true;
}

function StartSlideShow() {
CurrentSlide = -1;
Slides[0] = CacheImage(Slides[0]);
SlideReady = true;
ShowSlide(1);
}
</script>
<head>
<body onLoad="StartSlideShow()">
<form name="SlideShow">
<table>
<tr>
<td colspan=2><img name="Screen" width=200 height=300></td>
</tr>
<tr>
<td><input type="button" name="Previous"
value=" << "
onClick="ShowSlide(-1)"></td>
<td align="right"><input type="button" name="Next"
value=" >> " onClick="ShowSlide(1)"></td>
</table>
</form>
</body></html>

(出处:http://www.sheup.com)


[1] 

value=" << "
onClick="ShowSlide(-1)"></td>
<td align="right"><input type="button" name="Next"
value=" >> " onClick="ShowSlide(1)"></td>
</table>
</form>
</body></html>

(出处:http://www.sheup.com)


 [1] [2] 

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