1 files changed, 23 insertions, 0 deletions
diff --git a/admin/themes/default/js/common.js b/admin/themes/default/js/common.js
index a017115db..0f6435387 100644
--- a/admin/themes/default/js/common.js
+++ b/admin/themes/default/js/common.js
@@ -8,6 +8,29 @@ function str_repeat(i, m) {
   return o.join('');
 }
 
+if (!Array.prototype.indexOf)
+{
+  Array.prototype.indexOf = function(elt /*, from*/)
+  {
+    var len = this.length;
+
+    var from = Number(arguments[1]) || 0;
+    from = (from < 0)
+         ? Math.ceil(from)
+         : Math.floor(from);
+    if (from < 0)
+      from += len;
+
+    for (; from < len; from++)
+    {
+      if (from in this &&
+          this[from] === elt)
+        return from;
+    }
+    return -1;
+  };
+}
+
 function sprintf() {
   var i = 0, a, f = arguments[i++], o = [], m, p, c, x, s = '';
   while (f) {