Minor JS fix for r49408

diff --git a/skins/common/wikibits.js b/skins/common/wikibits.js
index ca91418..30686fb 100644 (file)
--- a/skins/common/wikibits.js
+++ b/skins/common/wikibits.js
@@ -431,7 +431,8 @@ function checkboxClickHandler(e) {
        }
        for (var i = start; i <= finish; ++i ) {
                checkboxes[i].checked = endState;
-               if( i > start ) checkboxes[i].onchange(); // fire triggers
+               if( i > start && typeof checkboxes[i].onchange == 'function' )
+                       checkboxes[i].onchange(); // fire triggers
        }
        lastCheckbox = this.index;
        return true;