jquery ui changing themes

Some undocumented Google CDN Feature

link to stylesheet in the head section:

<link href="./jquery/css/start/jquery-ui.css" type="text/css" rel="stylesheet" />

javascript function to change theme:

function ThemeChange(mytheme){
  $("link[rel=stylesheet]").attr({href : "./jquery/css/" + mytheme + "/jquery-ui-1.7.2.custom.css"});
  $("#mytab").tabs('select', 0);
}

html code that is calling the javascript function:

<div id="divloadfiles" style="display: block; font-size: 10px; text-align: left;">
<select id="mytheme" onchange="javascript:ThemeChange(this.value);">
  <option value="redmond">redmond</option>
  <option value="sunny">sunny</option>
  <option value="smoothness">smoothness</option>
  <option value="vader">vader</option>
  <option value="blitzer">blitzer</option>
  <option value="le-frog">le-frog</option>
  <option value="overcast" selected="selected">overcast</option> 
  <option value="pepper-grinder">pepper-grinder</option>
  <option value="start">start</option>
</select>
</div>