Input via textbox

Problem:
Alright. I'm trying to make a swagbucks generator to help some people out. I thought it'd be simple (it'd be incredably easy in VB.net) but it sure as hell isn't in GM (well, for me. XD).
I'm trying to do something like this:

Code (Text):

1.  
2. var swaginput = (how do I make a textbox?)
3. var swaginput2 = (how do I make a textbox?)
4. document.body.AppendChild(swaginput)
5. document.body.AppendChild(swaginput2)
6. var cmdgo = var add = document.createElement("button");
7. add.innerHTML = "Go!";
8. document.body.AppendChild(cmdgo)
9. add.addEventListener("click", function() {document.location.href('http://swagbucks.com/?sourceid=Mozilla-search&q=' + swaginput.text);
10. set.windowTimeout((document.location.href('http://swagbucks.com/?sourceid=Mozilla-search&q=' + swaginput2.text'), randomref);
11. }
12.  

+ // How do I 'appendchild' to a seperate part of the document? {ex: document.TheXpathOfAPlaceOnThePage.AppendChild?}

I know I probably have countless (not just probably, but 99.99999% says I do) errors in syntax and code. All suggestions are VERY very welcome.
<3
Fex