The basket system we currently use is JavaScript. It is http://www.jshop.co.uk/.

The problem is our JavaScript basket is causing problems. If someone clicks to add a product to the basket and then clicks 'back' in their browser, when they then revisit their basket the values of the products and total in the basket read "undefined", in some circumstances (not sure what determines whether the problem occurs).

My question is, is there a better basket we could use? I prefer to use JAVA SCRIPT baskets rather than PHP because PHP pages can cause problems with ranking in search engines. I cannot write Java Script so I need some software that generates all the coding.

I look forward to your suggestions,