Two things...
1. If you use that page as partial, you should clean it of all the HTML/HEAD/BODY/FORM things, and left only the main content... I twill load faster and you will have less problem with rendering...Or think about loading only page fragments:
.load() | jQuery API Documentation[
^]
2. JQuery's load will clear any JavaScript from your page prior putting the content in the specified element... So you have to link to external JavaScript if you want to use it...