// Caller Stack utility JavaScript Function
// File:    callerStack.js
// Author:  Eric Baars
// WebGENCAT: 3.0
// Version: 1.1
// History:
//     4 Apr 2001  Initial creation
//    26 Jun 2001  Deal with deep-level calls...ETB
//    11 Jul 2001  Deal with independent window calls...ETB
//    24 Jul 2002  Added check for create to do expansion into proper entry window...CJF
//     7 Aug 2008  Added try catch top.opener.top.typeID...Derek Lam

var callerTop = null;
var temp = top.name.split('_');
if (temp[1] == '0' || top.name == 'Browse1') {
  callerTop = null;
} else if (temp[1] == '1') {
  callerTop = top;
} else {
  try {
    if (top.opener && top.opener.top.typeID == "Entry") {
      callerTop = top ;
    } else if (top.opener) {
      callerTop = top.opener.top.callerTop;
    } else {
      callerTop = null;
    }
  } catch (exception) {
    callerTop = null;
  }
}