Need a bit of help with Drop Down Lists

I have some drop down list tests I am playing with here:

http://www.my-plague.net/list.php

There are a few thing I need help with:

1) If I don't put a "select" url, if go is clicked on I get a server error. I just want it to do nothing. e.g. with the header.

2) If I put a style for a "select" that has no url, then the list reverts to a square more box-like shape.

3) I want to make the go button open the urls in a new window.

4) I don't know what the js code at the end does because it still works without it (found the code in a tutorial) :

<script language="JavaScript">
<!--
function gotoLink(form) {
   var OptionIndex=form.ListBoxURL.selectedIndex;
   parent.location = form.ListBoxURL.options[OptionIndex].value;}
//-->
</script>

Code (markup):

thanks.

 

No one can help with this?

 

Can you put the url as "http://whateverthedomain.com/#" to have it do nothing and put "http://whateverthedomain.com/url.html" target="_blank" to have it open a new page?

I may not be understanding exactly what you are trying to achieve - if you can give me the reasoning behind it I may be able to help you figure something out.

 

Thanks for the reply.

I can't put the domain of the page it is on for it to do nothing because it reloads the page when I press go plus when I get the new window working it will open it in a new window as well.

I can't use target="_blank" because it is not an "a href" url

 

I solved number 1) by changing "option selected" to "option value" for the header.

any help with the other problems?

 

http://javascript.internet.com/navigation/jump-menu-2.html

 

Thanks, but it doesn't solve any of my problems. Its similar code which will cause all the same problems that I have with the current code I am using.