error in the code
 

I get this error

https://vborg.vbsupport.ru/external/2008/04/5.gif

everytime i goto to view a thread on my forum no matter which thread it is i try and view this error comes up i have looked at the showthread.php and cannot find the error this is relating too in there on line 160 i am clearly looking in the wrong place for this and just wondered if anyone here knew where i should start looking as this is really bugging me i hate errors. thanks in advance for help

This is a JavaScript error, not an error related directly to showthread.php.

To troubleshoot this, please remove any hacks and disable your plugins, then see if you still have this problem.
Note: To temporarily disable the plugin system, edit config.php and add this line right under <?php

define('DISABLE_HOOKS', true);

If so, reupload all the original vB non-image files (except install.php). Make sure you upload these in ASCII format and overwrite the ones on the server.

If your problem still exists, please create a new Style with no Parent set. Now browse the forum using this new style, do you still have the same problems? If you are troubleshooting login or guest issues, you will need to set this style as board default in the vBulletin Options.