Java script Confirm with Yes No buttons

You can write javascript with diffrent button options like YesNo, YesNoCancel etc.
You can change the code 4132 and see the O/P.
To Complete this task, just write following java script in your code,
< script language=javascript >

function window.confirm(str)
{
  execScript('n = msgbox("'+str+'","4132","Title")', "vbscript");
  return(n == 6);
}

</script>

In this script, the line will execute vbScript's Message box withYesNo Option.
execScript('n = MsgBox("Yes Or No?",vbYesNo,"Title")', "vbscript");