404 when there are slashes in source text

When you have a select box that contains items with slashes in their value you get a 404 error. I traced the problem to the encodeURIComponent() function called in activeselect.js. I replaced three instances of this function with encodeURI() on lines 229 and 230. Ref: http://xkr.us/articles/javascript/encode-compare/

I know I've found difference between these functions before, but I can't remember what they are so I don't know if they are consequences to this change. However, activeselect works for me now. Thanks for the great module!