JavaScript include()

include.js

// From http://xkr.us/
/** include - including .js files from JS - bfults@gmail.com - 2005-02-09    **
 ** Code licensed under Creative Commons Attribution-ShareAlike License      **
 ** http://creativecommons.org/licenses/by-sa/2.0/                           **/
var hIncludes = null;
function include(sURI)
{
  if (document.getElementsByTagName)
  {
    if (!hIncludes)
    {
      hIncludes = {};
      var cScripts = document.getElementsByTagName("script");
      for (var i=0,len=cScripts.length; i < len; i++)
        if (cScripts[i].src) hIncludes[cScripts[i].src] = true;
    }
    if (!hIncludes[sURI])
    {
      var oNew = document.createElement("script");
      oNew.type = "text/javascript";
      oNew.src = sURI;
      hIncludes[sURI]=true;
      document.getElementsByTagName("head")[0].appendChild(oNew);
    }
  }
}