note 47093 added to function.imagegif

I'm using imagegif to display a captcha image to verify human input on a website. The problem is the image is sometimes loading too late, and the previous image is being displayed (hence making the user's input incorrect). Using imagegif, is there a way to preload the image? ---- Manual Page -- http://www.php.net/manual/en/function.imagegif.php Edit -- http://master.php.net/manage/user-notes.php?action=edit+47093 Delete -- http://master.php.net/manage/user-notes.php?action=delete+47093&report=yes Reason: bad code -- http://master.php.net/manage/user-notes.php?action=delete+47093&report=yes&reason=bad+code Reason: spam -- http://master.php.net/manage/user-notes.php?action=delete+47093&report=yes&reason=spam Reason: useless example -- http://master.php.net/manage/user-notes.php?action=delete+47093&report=yes&reason=useless+example Reason: contains commercial links -- http://master.php.net/manage/user-notes.php?action=delete+47093&report=yes&reason=contains+commercial+links Reason: useless note -- http://master.php.net/manage/user-notes.php?action=delete+47093&report=yes&reason=useless+note Reject -- http://master.php.net/manage/user-notes.php?action=reject+47093&report=yes Search -- http://master.php.net/manage/user-notes.php