Index: diff-doc.js
===================================================================
--- diff-doc.js	(BASE)
+++ diff-doc.js	(HEAD)
@@ -1,4 +1,9 @@
 var objArgs,num,sBaseDoc,sNewDoc,objScript,word,destination;
+// Microsoft Office versions for Microsoft Windows OS
+var vOffice2000 = 9;
+var vOffice2002 = 10;
+var vOffice2003 = 11;
+var vOffice2007 = 12;
 // WdCompareTarget
 var wdCompareTargetSelected = 0;
 var wdCompareTargetCurrent = 1;
@@ -7,6 +12,10 @@
 var wdMasterView = 5;
 var wdNormalView = 1;
 var wdOutlineView = 2;
+// WdSaveOptions
+var wdDoNotSaveChanges = 0;
+var wdPromptToSaveChanges = -2;
+var wdSaveChanges = -1;
 
 objArgs = WScript.Arguments;
 num = objArgs.length;
@@ -27,7 +36,7 @@
 }
 if ( ! objScript.FileExists(sNewDoc))
 {
-    WScript.Echo("File " + sNewDoc +" does not exist.  Cannot compare the documents.");
+    WScript.Echo("File " + sNewDoc + " does not exist.  Cannot compare the documents.");
     WScript.Quit(1);
 }
 
@@ -48,17 +57,27 @@
 // Open the new document
 destination = word.Documents.Open(sNewDoc);
 
-if(((destination.ActiveWindow.View.Type == wdOutlineView) || (destination.ActiveWindow.View.Type == wdMasterView)) && (destination.Subdocuments.Count == 0))
+// If the Type property returns either wdOutlineView or wdMasterView and the Count property returns zero, the current document is an outline.
+if (((destination.ActiveWindow.View.Type == wdOutlineView) || (destination.ActiveWindow.View.Type == wdMasterView)) && (destination.Subdocuments.Count == 0))
 {
+    // Change the Type property of the current document to normal
     destination.ActiveWindow.View.Type = wdNormalView;
 }
 
-
 // Compare to the base document
-destination.Compare(sBaseDoc, "", wdCompareTargetNew, true, true);
+if (Number(word.Version) <= vOffice2000)
+{
+    // Compare for Office 2000 and earlier
+    destination.Compare(sBaseDoc);
+}
+else
+{
+    // Compare for Office XP (2002) and later
+    destination.Compare(sBaseDoc, "", wdCompareTargetNew, true, true);
+}
     
 // Show the comparison result
-if (Number(word.Version) < 12)
+if (Number(word.Version) < vOffice2007)
 {
 	word.ActiveDocument.Windows(1).Visible = 1;
 }
@@ -68,7 +87,7 @@
 word.ActiveDocument.Saved = 1;
     
 // Close the first document
-if (Number(word.Version) >= 10)
+if (Number(word.Version) >= vOffice2002)
 {
-    destination.Close();
+    destination.Close(wdDoNotSaveChanges);
 }