Feedback on: irt.org FAQ Knowledge Base Q52

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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.

Other feedback on 'irt.org FAQ Knowledge Base Q52' - show all

• irt.org FAQ Knowledge Base Q52 - funky Saturday July 07, 2007 at 12:17:15
• irt.org FAQ Knowledge Base Q52 - ThomAce Saturday June 30, 2007 at 10:11:52
• irt.org FAQ Knowledge Base Q52 - Ron Brown April 13, 2002 at 05:16:42:
• irt.org FAQ Knowledge Base Q52 - Kim Moser July 22, 2001 at 07:34:28:
• irt.org FAQ Knowledge Base Q52 - Ryan Kelly 18:41:58 6/12/01
• irt.org FAQ Knowledge Base Q52 - Bo 17:02:40 2/23/01
• irt.org FAQ Knowledge Base Q52 - Ryan Kelly 19:09:51 8/23/00
• irt.org FAQ Knowledge Base Q52 - pablo 09:51:19 7/07/00