--- dokuwiki-2011-05-25a/lib/plugins/imagereference/script.js      2009-01-07 21:48:25.000000000 +1300
+++ dokuwiki/lib/plugins/imagereference/script.js       2011-12-16 11:40:42.128166685 +1300
@@ -3,7 +3,8 @@
        var divs=document.getElementsByTagName("DIV");
  
       for (var i=0;i<divs.length;i++) {
-        if (divs[i].className == "imgcaption" || divs[i].className == "imgcaptionleft" || divs[i].className == "imgcaptionright") {
+        // adding in more checks to ensure elements exist [jmt12]
+        if (divs[i] && divs[i].childNodes[0] && divs[i].childNodes[0].childNodes[0] && (divs[i].className == "imgcaption" || divs[i].className == "imgcaptionleft" || divs[i].className == "imgcaptionright")) {
  
             var children = divs[i].getElementsByTagName("IMG");
             // check if there is a link encapsulating the image        
@@ -13,12 +14,16 @@
             else {
                 // we have link and we can build the link image
                 var innerElements = divs[i];
-                var iLink = innerElements.childNodes[1].childNodes[2];
-                var iSpan = iLink.childNodes[0];
-                // set the href of the link to the image link
-                iLink.href= innerElements.childNodes[0].href;
-                // show the link image
-                iSpan.style.display="inline";
+                // adding in more checks to ensure elements exist [jmt12]
+                if (innerElements && innerElements.childNodes[0] && innerElements.childNodes[1])
+                {
+                  var iLink = innerElements.childNodes[1].childNodes[2];
+                  var iSpan = iLink.childNodes[0];
+                  // set the href of the link to the image link
+                  iLink.href= innerElements.childNodes[0].href;
+                  // show the link image
+                  iSpan.style.display="inline";
+                }
             }    
             //var tmpLink = divs[i].childNodes[0];
             divs[i].style.width=(tmpImg.width + 8)+"px";