var navBar;

function insertSearchBar(){
  navBar = document.getElementById('navigation');
  var allMenus = navBar.getElementsByTagName("DIV");
  
  var searchBarWidth = 1000;
  for (i=1; i < allMenus.length; i++) {
    searchBarWidth = searchBarWidth - allMenus[i].offsetWidth;
  }
  var searchDiv = document.createElement('DIV');
  searchDiv.innerHTML = "<form method='post' action='index.php?pid=26'><input type='text' name='search' id='search' value='' style='width:" + (searchBarWidth - 48) + "px;'></form>";
  searchDiv.style.width = searchBarWidth - 26;
  searchDiv.style.textAlign = "center";
  searchDiv.className = 'last';
  allMenus[0].appendChild(searchDiv);
}