Opening Hyperlinks inside Excel WebAccess webpart in the Same Window

I have the same question as in this link, but this solution is not working for me.

$(document).ready(function() { 
$(".ewr-sheetcontainer a").each(function(){
  $(this).attr("onclick","openLink(this)");     
});
});
function openLink(Atagproperties)
{ 
  Atagproperties.target = "_self";
}

Problem is .ewr-sheetcontainer has role="Presentation" atttribute, which will delete the contents from accessible tree. (But how come it is working for them?)

Is this the reason it is not working for me? or Am I missing anything?

Appreciate your help on this. Thanks, Maddy