title: JavaScript function to convert UTF8 string between fullwidth and halfwidth forms
body: <p>EDIT: Thanks to <code>GOTO 0</code>, I now know exactly what I my question is called. </p>
  
  <p>I need a JavaScript function to convert <a href="http://www.fileformat.info/info/unicode/block/halfwidth_and_fullwidth_forms/utf8test.htm" rel="noreferrer">from UTF-8 fullwidth form to halfwidth form</a>.</p>