Veryifing A Link is available

[pastorOfMuppets]

Hi,

I want to be able to have an image or some text (either will be fine) to show wether or not my home server is online. I want visitors to my website to be able to see wether or not my server at home is online, so they know wether or not they can download from me. I have created an image file that sits on my server saying that i am online, and this shows on the website when the server is online, but when it is offline, the image does not display .

Anyideas on how i can verify if a link works?

Thanks a lot

[pastorOfMuppets]

hmm no responses , Does anyone think that this is outside the range of Javascript?

Thanks all!

[jkd]

<img src="http://someip/serverup.gif" alt="Server status" onerror="alert('Server down!')"/>

[pastorOfMuppets]

Thnks JKD

[jalarie]

To JKD: That seems to work rather well if the server is down the first time I try it, but what if it was once up, the image was cached, and the server is now down?

[joh6nn]

try this:

<script>
var timeout;
function online() {
document.images['status'].onerror = 'path/to/offline.gif';
document.images['status'].src = 'path/to/online.gif';
setTimeout('online();', 30000);
}

window.onload = function() { setTimeout('online();', 30000);
}
</script>

<IMG NAME="status" SRC="about:blank;">

didn't test it at all, but in theory, that will check if your server is online every 5 minutes, and update the picture accordingly. also, instead of alerting, it loads another picture into your image tag, if you're offline.

[Quiet Storm]

WOW! That's cool! Gives me some new ideas...

[whammy]

I've just got to add:

pastorOfMuppets is a very cool name... heheh

Sounds like a Wierd Al "Metallica Parody" Album... LOL

/me sings:

"pastorOfMuppets is preaching to me... frogs can't go out with Miss Piggy... blinded by love it don't mean a thing... he just doesn't buy a cross-species ring... pastor! pastor!"

Hehehe...

[pastorOfMuppets]

thanks to all the others for posting ideas, (espically the ones that have got something to do with the topic)

thanks!