jQuery for Gmail Sidebar

gistfile1.js

var $main_frame = $('#canvas_frame').contents();
var $sideBar = $main_frame.find('.HbF0O > .nH');
if ($sideBar.length > 0){
  if ($sideBar.children().length == 3){
    $sideBar.find('.ChoCtb .nH:last-child').after(html);
  } else {
    $sideBar.prepend(html);
  }
  $sideBar.children('.nH:last-child').hide();  
}else{
  $main_frame.find('.nH.adC > .nH > .nH:last').remove();
  $sideBar = $main_frame.find('.nH.adC > .nH > .nH:last');
  $sideBar.html(html);
}