First of all, I posted this in Joomla Stackexchange because I have created a simple html file and the disabling of the dropdown works.

I have this javascript code right here:

function disable()
   var x = document.getElementById('jform_report');
        x.disabled = true;

I even created this long code just to make sure that I am getting the Id of the dropdown. Which I got successfully. The problem is, the dropdown still remains enabled. I tried this code with other fields such as a textbox. They work except for dropdown lists.

Also, when I use inspect element in the page, this code appears just below the code tag of my dropdown list please see the highlighted area:

enter image description here


I think that the problem is in chosen. You are disabling just your select, but chosen renders its content. Please see this question for the possible solution.

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