Add to cart popup and ask a question not working!!

[abhkum]

HI,
I have searched almost all the topics in this forum, and tried almost everything but still cant ge ti right.
when i click on add to cart button (enquire now), pop up doesnt come up, also when i click ask a question button, instead of a popup window, a new window opens up ...

vm version: 2.0.20b, joomla: 2.5.11

url: http://factorystocks.in/index.php?option=com_virtuemart&view=productdetails&virtuemart_product_id=52&virtuemart_category_id=95&Itemid=243

Please someone help me!
Thanks

[jenkinhill]

The enquire/buy button works OK for me in IE10 and Firefox23, but ask a question had aJavaScript conflict. Try removing gantry-totop.js and then disable the roknavmenu module to see which of those causes the problem.