title: jQuery UI AutoComplete: Only allow selected valued from suggested list
body: <p>I am implementing <strong>jQuery UI Autocomplete</strong> and am wondering if there is any way to only allow a selection from the <strong>suggested results</strong> that are returned as opposed to allowing any value to be input into the text box.</p>
  
  <p>I am using this for a tagging system much like the one used on this site, so I only want to allow users to select tags from a pre-populated list returned to the autocomplete plugin.</p>