title: Overriding/Extending the Magento core javascript files
body: <p>Last days as a result of some customer complains and discussion with our marketing guys I've got a request to change the default behavior of the configurable products options. They asked me to remove the + $xx.xx from the options drop-down as it is confusing the customers/visitors and just leave the available options without displaying the price change. Fair enough from their point of view, but it is a bit tricky from developers point of view I think. The site is running Magento CE 1.6.2, and the file which we need to override/change is /public_html/js/varien/configurable.js. We need to change the getOptionLabel function in it so that it does not display the price change.
  So my question is: what is the right Magento way to change this file and not touch the core javascript file?
  Thanks in advance.</p>