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JavaScript problem to reload images

Hello,

I have made a code who reload an image in an infinite loop.

But the problem is that the numbers of elements just growing up with the time, and on my iPhone with Mobile Safari, after a moment, the reloads just stop.

I think it's because of a memory saturation.

How can I do to "free" olds images ?

Sorry for my ugly english, and thanks in advance !
<html>
	<script type="text/javascript" language="JavaScript">
	
			image1 = new Image();
			image2 = new Image();
 
	
		function reloadImage() {
 
			date = new Date();
 
			document.getElementById("texte").innerHTML = date.getTime();  
			
			image1.src = 'image.php?time=' + date.getTime();
			image2 = image1;
			document.getElementById("webcam").src = image2.src;
		}
		
		function reloadTimer() {
			setTimeout("reloadImage()", 500);
		}
 
	</script>
	
	<div id="texte" >XXXX</div>
	
	<img id="webcam" onLoad="reloadTimer()" src="image.php">
</html>

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Valty
Asked:
Valty
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2 Solutions
 
jazzIIIloveCommented:
Hi there;

<<I have made a code who reload an image in an infinite loop.

Why is that? Purpose?

<<How can I do to "free" olds images ?

What's that?

Best regards...
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ValtyAuthor Commented:
Hello jazzllllove, thanks you for your fast answer

My code can download a picture of my webcam updated regularly. A sort of streaming, but with a single image.

I do JavaScript for a short time, I wanted to know if it was necessary to "liberate" the memory of the old images, or if my problem is not here.

Regards,
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jazzIIIloveCommented:
A nice tutorial related with your problem:

http://www.javascriptkit.com/javatutors/closuresleak/index.shtml
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ValtyAuthor Commented:
I have read the link, but I'm not really familiar with this.

Are you sure the problem I have is in relation with memory leaks ?

I would be very grateful if you could give me a sample code
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Pawel WitkowskiSenior Javascript DeveloperCommented:
I think that its more related with cache in browsers rather than memory leaks.

You can try      delete     statement, but i never tried that :(

But first of all... i dont know how this should work. You have setTimeout (so it will fire a function once) and there is no more call to reloadImages()  so after one change there will be nothing more. Just try setInterval, od use setTimeout again at the end of reloadImages function.

And as i said try before adding new Image just put  delete image1 and delete image2 maybe this will help

regards
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ValtyAuthor Commented:
Hello wilq32, thanks you for your answer

I have already tested with delete, but according to this post, my problem seems to be a specific mobile safari problem, because I have not this problem with other browsers :

http://groups.google.com/group/iphonewebdev/browse_thread/thread/78eeb249726f27f6?hl=en
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Pawel WitkowskiSenior Javascript DeveloperCommented:
nothing more to add :( just wait for new version of mobile browser..
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ValtyAuthor Commented:
Yes, I think this is the best I can do for the moment, I assign the points !
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ValtyAuthor Commented:
Thanks !
0

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