How do I check if an image file exists?

[mjpost]

I want to write a link only if a certain image exists in the target folder.

I need to use a client side script as this site will eventually end up as a CD-ROM based CBT.

So, anyone have a quick javascript that will check to see if a file exists?

 

[sim777]

One possible way is to use onload function for images. If image exists the onload events occurs. I used this method for our Product CD to check the new product version.
Look the following example:

<Script LANGUAGE=&quot;JavaScript&quot;>
function check(imgURL) {
var img=new Image();
img.onload=exists;
img.src=imgURL;
}
function exists() {
alert(&quot;exists&quot;
}
</script>

PS. Opera does not support onload for image

Regards,
Sergey Smirnov

http://www.exadel.com