I'm new to Javascript and want to write a script which will loop through the files in a folder and display them in a webpage. I've written the following which alternately displays two images in a folder, but I want to be able to add new files to that folder and have them added to this loop. I'm assuming I just need some code to populate the list of files in the folder, but don't know how to do that, nor how to make var have a variable max depending on the number of files. This will all be displayed locally, so there's no kind of web server. - <html>
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<head>
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<title>CMM Reference Part Check Compliance</Title>
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<script type="text/javascript">
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<!--
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var image1=new Image()
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image1.src="Slide1.gif"
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var image2=new Image()
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image2.src="Slide2.gif"
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//-->
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</script>
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</head>
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<body>
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<img src="Slide1.gif" name="slide" width="95%" height="95%" />
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<script>
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<!--
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//variable that will increment through the images
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var step=1
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function slideit() {
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//if browser does not support the image object, exit.
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if (!document.images)
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return
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document.images.slide.src=eval("image"+step+".src")
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if (step<2)
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step++
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else
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step=1
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//call function "slideit()" every 10 seconds
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setTimeout("slideit()",1000)
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}
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slideit()
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//-->
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</script>
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</body>
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</html>
How might I do this?
Thanks very much for your help
5  9407  Dormilich 8,658
Recognized Expert Moderator Expert
I don't think that javascript can read a directory, but if you name the files consistently you can request each of it with a loop.
Thats part of the issue, the names won't be consistent since they'll be related to all sorts of different things. What would I use instead then? PHP was mentioned somewhere but I know absolutely nothing about that.
Here,
put this code in images.php, and place the file in your images directory. -
<?php
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header("Content-Type: text/javascript");
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$AllowedExtensions = array(".gif", ".jpg", ".png", "jpeg");
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echo "var images = new Array();";
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$d = dir("./");
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while (false !== ($entry = $d->read()))
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{
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if($entry != '.' && $entry != '..' && is_file($entry) && in_array(substr($entry,-4), $AllowedExtensions))
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{
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echo "images.push('{$entry}');";
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}
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}
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$d->close();
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?>
Then just call this file within <SCRIPT> -
<script type="text/javascript" src="images/images.php"></script>
Thanks very much, but how do I use that in the HTML? Where do I set the time delay between updating etc? (I'm new to all of this)
Dormilich 8,658
Recognized Expert Moderator Expert @Ca1icoJack
just call the script (as Canabeez posted) @Ca1icoJack
that's a question how you set the cache instructions. probably - // in images.php
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header('Cache-Control: must-revalidate');
could suffice (more Cache-Control options). Cache instructions may also be set by the server.
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