eSport and VM Custom Filters

We're using eSport template with Joomla 2.5.27 and VM 2.6.10, and also VM Custom Filters. VM Custom Filters module provides the detailed product search with various criteria, including the price. Price is to be selected with slider that doesn't work on eSport template (please see site at http://www.parking-senzori.hr). We've contacted the authors of that extension and they answered that there's an error in template files that could be causing this problem. They wrote:

Error: TypeError: document.id(...).getElement(...) is null
Source File: http://www.parking-senzori.hr/templates ... scripts.js
Line: 200

How can we fix this? Thanks.

Hi

Can You please tell me on which page I can see this error ? Try also renaming /html/com_virtuemart to /html/_com_virtuemart just to test if this search will work than.