added some comments to image-preloading code

[phpfspot.git] / phpfspot.js

diff --git a/phpfspot.js b/phpfspot.js
index ebe124225f169a182530acda770bdccc46c22f72..75d0ed73a72c0a0700b3200cf8122bf28735c414 100644 (file)
--- a/phpfspot.js
+++ b/phpfspot.js
@@ -660,17 +660,19 @@ function preloadPhotos(image_url) {
    var waiting = 100;
    var counting;
 
-   lbImg=WSR_getElementsByClassName(document,"img","thumb");
-   for(i=0;i<lbImg.length;i++){
-      lbImg[i].src=image_url[i];
-      // to not bomb the server with requests, give the page some time
-      // to load the images one by one. if a image exceeds the timeout,
-      // the next image will be loaded.
-      if(lbImg[i].complete != undefined && lbImg[i].complete != true) {
-         counting = 0;
-         while(lbImg[i].complete != true && counting < timeout) {
-            window.setTimeout("noop()", waiting);
-            counting+=waiting;
+   lbImg = WSR_getElementsByClassName(document,"img","thumb");
+   if(lbImg != undefined) {
+      for(i=0;i<lbImg.length;i++){
+         lbImg[i].src=image_url[i];
+         // to not bomb the server with requests, give the page some time
+         // to load the images one by one. if a image exceeds the timeout,
+         // the next image will be loaded.
+         if(lbImg[i].complete != undefined && lbImg[i].complete != true) {
+            counting = 0;
+            while(lbImg[i].complete != true && counting < timeout) {
+               window.setTimeout("noop()", waiting);
+               counting+=waiting;
+            }
          }
       }
    }