how to load a string into dom

//------------- load a string into dom --------
//@param: string to be loaded
//@return: xml dom document
function dom_load(string)
{
//alert("dom_load");
if (window.DOMParser)
  {
  parser=new DOMParser();
  xmlDoc=parser.parseFromString(string,"text/xml");
  }
  else // Internet Explorer
  {
  xmlDoc=new ActiveXObject("Microsoft.XMLDOM");
  xmlDoc.async="false";
  xmlDoc.loadXML(string);
 
  }
}