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Feedback on:
irt.org FAQ Knowledge Base Q52
Sent by
Ryan Kelly on August 23, 2000 at 19:09:51:
Worth:
Worth reading
Length:
Too short
Technical:
Just right
Comments:
You can also use the Image() object to test for the existence of a generic image (or any number of images) without ever displaying them on the page:
function testImage(URL)
{
var tester=new Image();
tester.onLoad=isGood;
tester.onError=isBad;
tester.src=URL;
}
function isGood()
{
alert('That image exists!');
}
function isBad()
{
alert('That image does no exist!');
}
This can be useful if, for example, the user must specify an image and you want to check whether it exists before submitting the form.
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