CRM2011-How to close Dialog-"Unsaved Changes"(Not the parent Window) from a Javascript

CRM2011-How to close Dialog-"Unsaved Changes"(Not the parent Window) from a Javascript

I am using below Javascript to close the Dialog-"unsaved Changes" but it is now working. 

var attributes = Xrm.Page.data.entity.attributes.get();
  for (var i in attributes)
    {       attributes[i].setSubmitMode("never"); }

Am i missing something?? If i use Xrm.Page.ui.close(); under the above lines it is closing the parent window as well. 

Any response on this would be much appreciated.

Madhu M.