DOMDeathOnUnloadDiscovery.js

window.onunload = function()
{
  var _check = function(lbl)
  {
    var a;
    
    if(window.document && document.body)
      a = 'body';
    else if(window.document && document.documentElement)
      a = 'documentElement';
    else if(window.document)
      a = 'document';
    else
      a = 'none';
    
    (alert)('' + lbl + ' ' + a);
  };
  var time = 0;
  var _checkThread = function()
  {
    _check(time);
    setTimeout(_checkThread, 0);
    time += 1;
  };
  
  _check('now');
  _checkThread();
};

if(window.opera)
{
  history.navigationMode = 'compatible';
  location = 'http://google.com/';
}

/* 
chrome v5
now body
0 body

ie7
now body
0 body

ff3.6
now body
0 body

opera 
now body
0 body
*/