I have a script that checks to see if photos are available then displays a large photo then thumbnails. The problem is I do not know where the photo is located or if it exists. I have it working fine but it is a little slow loading since I have to load all possible sources and then check to see if they exist. I then hide them if they don't exist. Does anyone know how to skip over to the next source if the main image isn't found? Also a way to display a default image if no images are found would be great.
Here is my code.
<script language="JavaScript">
function ImageLoadFailed() {
window.event.srcElement.st
<%error="true"%>
}
</script>
<%
x=0
for x =0 to 9
error=""
mainpath="http://www.domai
mainimage=mainpath & mlsid & ".JPG"
%>
<img src="<%=mainimage%>" OnError="ImageLoadFailed()
<%
response.write error
i=0
For i = 0 to 8
filename=i
select case filename
case "0"
fileid=""
case "1"
fileid="A"
case "2"
fileid="B"
case "3"
fileid="C"
case "4"
fileid="D"
case "5"
fileid="E"
case "6"
fileid="F"
case "7"
fileid="G"
case "8"
fileid="H"
case else
fileid=""
end select
photolink=mainpath & mlsid & fileid & ".JPG"
%>
<a href="javascript:image_cli
<img src="<%=photolink%>" width="36" height="30" OnError="ImageLoadFailed()
<script language="JavaScript">
function image_show_<%=i%><%=x%>()
{
image<%=i%><%=x%> =new Image();
image<%=i%><%=x%>.src =["<%=photolink%>"]
document.images['pimage<%=
}
function image_click_<%=i%><%=x%>(c
{
var image<%=i%><%=x%> =new Image();
image<%=i%><%=x%>.src="<%=
if(clicks==<%=i%><%=x%>){d
}
</script>
<%
next
%><%
next
%>
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mplungjan your code would show a notfound image for every image which would be over 100 images. I only want to display the image if it exists. Right now the code hides the image if it doesn't exits but really it still gets loaded. Ideally the no image would display if no images are found and only the main image would be the noimage.gif.
The no image part is not a big deal the main thing is to speed up the process of the check. Here is more info. I have 10 folders to check to see if an image exists. If the image exists I have to check to see how many photos are in the folder. There can be up to 10 images in the folder. As of right now it loads 100 images and hides the invalid sources. I would rather not display an image at all if it doesn't exist. On a high speed connection it loads pretty quickly but dialup its pretty slow.
Have you tried checking for the image files' existances server-side instead of client-side? May or may not be faster overall, but it'd at least remove some of the client-server chatter. (And you could cache the discovered information on the server so you don't have the code scanning the directories on every page view.)
If you're using ASP server-side, you might wanna check on the FileSystemObject available to ASP and other scripting. http://msdn.microsoft.com/
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by: mplungjanPosted on 2006-06-09 at 08:10:06ID: 16870992
Can't you turn the test?
<img style="display:none" src="<%=mainimage%>" onLoad="this.style.display
OnError="this.src='notfoun