Using IE9 (9.0.8112.16421) I receive the following error in the debugger while running the script I'm working on:

"Unable to get value of the property 'toLowerCase': object is null or undefined"

in the following function:

function ExecuteOrDelayUntilScriptLoaded(func, depScriptFileName)
    var eventName="sp.scriptloaded-"+depScriptFileName;
    return ExecuteOrDelayUntilEventNotified(func, eventName);

Any idea what is going on here?

  • How do you use ExecuteOrDelayUntilScriptLoaded? Or if this error appears when trying to use it with oob sharepont file (ExecuteOrDelayUntilScriptLoaded(function(){...}, "sp.js") for example)? Mar 12, 2012 at 20:00
  • Second scenario exactly. I'm just calling it in a $(document).ready(ExecuteOrDelayScriptLoaded(function(){...}, "sp.js")); call. The embedded function works fine when I add it to a click event for a dummy button. So I know there is no issue in that. Mar 13, 2012 at 0:09
  • Just to add some info. This was in a page I added tot he site pages gallery. When I added the code to my custom edit form the misbehaving method executed with no errors. From a practical perspective, it is moot, but from an understanding what went wrong perspective I am still trying to find an answer. Mar 13, 2012 at 17:55
  • I am now unable to duplicate the error at all. It might have been fixed via an IIS reset or the gremlins moved on to something else. I am debating closing the question as "too localized". Apr 4, 2012 at 20:00

1 Answer 1


Try this code:


 ExecuteOrDelayUntilScriptLoaded(function(){...}, "sp.js");


The document.ready() expects a function delegate where you cannot pass arguments directly.

  • I will give this a try. But like I mentioned above, the exact code worked in the CustomEditForm.aspx I created. This also would not really explain the error as the error states it is a problem in depScriptFileName not having a toLower() function. Mar 14, 2012 at 12:11
  • Nope, did not resolve the problem. Mar 14, 2012 at 20:49
  • Vardhaman, I'm going to select your answer. As I stated above. I cannot even reproduce the problem now... Apr 14, 2012 at 0:23

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