Javascript problems with CRM 2011 Update Rollup 12

We have faced problem for hiding the "NEW" button on lookup in CRM 2011 because It does not support following


As Microsoft blogs( suggests that this .AddParam() is not supported in Update Rollup 12 of CRM 2011

So,we create a workaround for this:-


This works fine cross-browser.


  1. Thanks you for this line of code.

    Have to add there is a typo in it though. It should be "_behaviors" instead of "_behaviours". Worked wonderfull after.


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