Using onerror to check existance of image

[iain]

I need to be able to check in Javascript whether an image exists and have been trying to use the onerror event, but just can't get it to work. Does anyone have any suggestions?

The code I have been using is as follows. What happens is that both the onerror AND the onload events execute. I'm using IE6 and Navigator 6.

function testImage {
    var tester=new Image();
    tester.onLoad=isGGood();
    tester.onError=isBBad();
    tester.src="testimage.jpg";
}

function isGGood() {
    alert('That image exists!');
}

function isBBad() {
    alert('That image does not exist!');
	}

[HardCoded]

That syntax is incorrect. You can't assign event handlers in that way. You are also missing parentheses on your testImage function.

Try

function testImage() {
    var tester=new Image();
    tester.onload=isGGood;
    tester.onerror=isBBad;
    tester.src="testimage.jpg";
}

[iain]

Thanks. I had taken the code out of another example and didn't realize that the onerror needed to be all lowercase and the () not in the event handler call.