How to force a browser to reload captcha image?

[heavyEddie]

 

I'm trying to force my captch to reload the image when a user clicks the image.  However, if you don't provide a unique URL some browsers will use a cached version of the image and not reload.  So, this is the code I'm trying to use, but it seems I'm doing something wrong.  Comes back with "now is not defined".

 

I'm pretty sure this is javascript 101

 

echo '<img src="captcha.php?id=' . $id . '" onclick="javascript: this.src=\'captcha.php?id=' . $id . '&time=\' + now.getTime();" />';

[heavyEddie]

Never mind, this seems to work well...

 

echo '<img src="captcha.php?id=' . $id . '" onclick="javascript: this.src=\'captcha.php?id=' . $id . '&time=\'  + (new Date()).getTime();" />';