Link based on any given number

[Romsky]

Okay, I am having some trouble here.

I want a person to be able to enter lets say "12345" in a box on my site, then hit a button, then they will be brought to "www.mysite.com/12345.pdf"

SO: "www.mysite.com/" and ".pdf" will never change, just the number in between will be based on whatever is entered into the original box.

Any ideas?

[RonPK]

<form action="" onsubmit="document.location='http://www.example.com/' + this.myBox.value + '.pdf'; return false">
<input type="text" name="myBox">
</form>