Parsing HTML with javascript - HTML on external page

[Siggles]

I have an external page with some rudimentary html in the source code missing many tags.. a bit like the below. On a page hosted elsewhere I need to take the html from this external page and add and remove certain parts of it and add some styling such as line breaks before ^FIELD01. I've looked at jquery and AJAX but cant find anything to suit my needs. I think what I am struggling with most is having this page in a variable to then be able to edit it. Please help.

^BEGIN SEARCH FORM

<form name="dancesearch" action="JJList.html?PHPSESSID=604918b69ab9936e638b5d48cdc142a3&xt=673">
^FIELD01: Dance Name<input name="ts" type="text" size="20" maxlength="25" />
^FIELD02: Choreographer<input name="cs" type="text" size="20" maxlength="25" />
^FIELD03: Added since...<select name="ag" size="1">
<option value="-1" selected="selected">Anytime</option>
<option value="2">February 16th, 2011</option>
<option value="3">February 15th, 2011</option>

<option value="4">February 14th, 2011</option>
<option value="5">February 13th, 2011</option>
<option value="10">February 8th, 2011</option>
<option value="11">February 7th, 2011</option>
<option value="12">February 6th, 2011</option>
<option value="14">February 4th, 2011</option>
<option value="15">February 3rd, 2011</option>
<option value="16">February 2nd, 2011</option>
<option value="60">Two months ago</option>

<option value="120">Four months ago</option>
<option value="180">Six months ago</option>
</select>

[Siggles]

I must use Javascript in the page that will eventually show the new source code which is why I am asking here.