wraps an img in anchor from sibling, and removes the anchor

imgwrap.jquery.js

  //where containerDiv is the parent of the img and a
  //where imgwrap is the anchor the img will be wrapped in
		$('.containerDiv').each(function() { 
			$('img',$(this)).wrap('<a href="' + $('.imgwrap',$(this)).attr('href') + '"></a>');
		});

		$('.imgwrap').remove();