jquery - javascript usage

jquery - javascript usage

I'm putting together an app that has few pages. I'm using an ajax call to popluate a div with 'sub pages'. Each of the sub pages has its own jquery / javascript stuff .  As I navigate between and return to pages what (if anything) do I need to clean up behind me.

I tend to use this kind of syntax in each page to act as a kind of namespace for function calling etc

var edit = {

init:function()
{
   
    $("#actSave").unbind("click").click(function()
    {
     if (edit.validation())
     {
         edit.save();
     }
     return;
       
    })   
   
    $("#actCancel").unbind("click").click(function()
    {
     
     return;
       
    })   
   
}

edit.init();

What do I need to do about 'edit' ? Can it or should it be made null.  Note that this page may get called many times in a single browser session

Any help appreciated