Using jQuery and memory leaks

I have been using jQuery for several months and have been reading about Javascript memory leaks for several days. I have two questions regarding memory leaks and jQuery:

• When I bind (using .bind (...)), do I need to untie them (.unbind ()) if I leave the page / update to avoid memory leaks or does jQuery delete them for me?

• Regarding closures, I read that they can lead to a memory leak if used improperly. If I do something like:

  function doStuff (objects) {// objects - jQuery object containing an array of DOM objects var textColor = "red"; objects.each (function () {$ (this) .css ("color", textColor);}); }

  doStuff ($ ("*"));

I know that the code above is dumb (better / easier) for this, but I want to know if this causes circular linking / closure problems with .each, and if this leads to a memory leak. If this causes a memory leak, how can I rewrite it (usually a similar method) to avoid a memory leak?

Thanks in advance.

Edit: I have another case similar to question 2 (which I think makes this part 3).

• If there is something like this:

  function doStuff (objects) {// iframe objects var textColor = "red";

  function innerFunction()
  {          
      $(this).contents().find('a').css("color", textColor );
  }
  
  objects.each(function(){   
      //I can tell if all 3 are running then we 
      //have 3 of the same events on each object, 
      //this is just so see which method works/preferred
  
      //Case 1
      $(this).load(innerFunction);
  
      //Case 2
      $(this).load(function(){
         $(this).contents().find('a').css("color", textColor );
      });
  
      //Case 3  
      $(this).load(function(){
         innerFunction();
      });
  });
  

  }
  doStuff ($ ("iframe"));

There are three cases above, and I would like to know which method (or all) will lead to a memory leak. Also I would like to know which one is preferred (usually I use case 2) or better (or if it is not good, what would be better?).

Thanks again!