HTML - Using Ampersand In Url

My html form contains a textarea that submits to a Java servlet. When the textarea content includes an ampersand (&), the servlet is treating what comes after the & as a separate parameter.

How can I overcome this?

Thanks,
James

Hi,

When I enter submit search terms into the search bar on my site (http://www.projectdisobey.com/disobeyclothing/), and then put the resulting page through a validation test at http://validator.w3.org/check, I get the following validation errors:

(See attachment)

I know that all these errors are resulting from an unencoded ampersand. My question is, which WordPress file do I need to go into in order to change the '&' to a '&'?

Can anybody help me?

Thanks