/*
   New Perspectives on XML
   Tutorial 10
   Tutorial Case

   Filename: library.js

   Global Variables:
   DOMPID
      An array contain the program IDs of MSXML ActiveX Objects for creating
      XML documents

   FreeThreadPID
      An array contain the program IDs of MSXML ActiveX Objects for creating
      free-threaded XML documents

   TemplatePID
      An array contain the program IDs of MSXML ActiveX Objects for creating
      XML template documents

   Functions List:
   getPID(pArray)
      Returns the most recent program ID supported by the current browser.

   removeWhiteSpaceNodes(node)
      Removes all white space text nodes contained within the specified node.

   resetForm()
      Clears all values from the data entry fields in the Web form.

*/

var DOMPID =        ["Msxml2.DOMDocument.5.0", 
                     "Msxml2.DOMDocument.4.0",
                     "Msxml2.DOMDocument.3.0", 
                     "MSXML2.DOMDocument", 
                     "Microsoft.XMLDOM"];

var FreeThreadPID = ["Msxml2.FreeThreadedDOMDocument.5.0",
                     "Msxml2.FreeThreadedDOMDocument.4.0",
                     "Msxml2.FreeThreadedDOMDocument.3.0"];

var TemplatePID =   ["Msxml2.XSLTemplate.5.0",
                     "Msxml2.XSLTemplate.4.0",
                     "Msxml2.XSLTemplate.3.0"];

function getPID(pArray) {
   var PIDStr = "";
   var PIDFound = false;
   for (i=0; i<pArray.length && !PIDFound; i++) {
      try {
         var objectXML=new ActiveXObject(pArray[i]);
         PIDStr=pArray[i];
         PIDFound=true;
      } catch (objException) {
      }
   }
   return PIDStr;
}

function removeWhiteSpaceNodes(node) {
   var noWhiteSpace = /\S/;
   for (var i=0; i < node.childNodes.length; i++) {
      testNode = node.childNodes[i];
      if (testNode.nodeType==3 && !noWhiteSpace.test(testNode.nodeValue)) {
         node.removeChild(testNode);
         i--;
      }
      if (testNode.nodeType==1) {
         removeWhiteSpaceNodes(testNode);
      }
   }
}

function resetForm() {
   for (i=0; i<=13; i++) {
      document.webform.elements[i].value="";
   }
}