How can I use a search button using JavaScript Triple Combo Box?

I am using this Cut & Paste Triple Combo s开发者_StackOverflow中文版cript.. This does not have a search button next to it. How can I put a search button instead of direct select URL linking?

Here is the double combo with Go button

But the triple does not have a search button. How can I put a search button in that Triple Combo Script?

Please provide all the code so I can just copy and paste, because I am not good with JavaScript programming.

Thank You. I will appreciate your help!

On your third select box there is an onchange event calling a function redirect2. Remove that.

After your third select box, create a button by using <input type="button" name="go" value="go">. Add a event on it: onclick=redirect2(document.getElementsByName('stage3')[0].options.selectedIndex);

And you are good to go.