Hide Left nav pane in Entity form

/* Code to Hide a Link in Left navigation Pane of a Entity */

var loadArea2 =  loadArea;

loadArea = function(area)
{
    loadArea2(area);
    if (area == 'fslr_fslr_survey_fslr_questionactionquery')
    {
        var iframe =
document.getElementById('fslr_fslr_survey_fslr_questionactionqueryFrame');
         iframe.onreadystatechange = function()
        {
            if (iframe.readyState == 'complete') {

document.frames['fslr_fslr_survey_fslr_questionactionqueryFrame'].document.getElementById('_MBtoplocAssocOneToMany10006fslrfslrsurveyfslrquestionactionquery').style.display = 'none';
            }
        }
    }
}