Uncaught TypeError Cannot change property of 'changeSelection' of undefined Magento 1.9 bundle product

Question

My bundled products aren't working properly.

On loading the product page it already goes wrong with the following error in the console:

Uncaught TypeError: Cannot read property 'reloadPrice' of undefined

When i select an option from the drop-down box, the amount field stays grayed out and i get an error in the console (Google Chrome) stating:

Uncaught TypeError Cannot change property of 'changeSelection' of undefined

The HTML from the amount field has the property disabled=""disabled", I guess this is supposed to change on making your selection thus enabling you to change the amount for the selection.

Answer 1

I got solution..

It's caused by our custom theme not adding the new product_options.js file.

In your theme layout file (either local.xml or catalog.xml) and add the following js under the catalog_product_view

varien/product_options.js