function setHomepage()
{
 if (document.all)
    {
        document.body.style.behavior='url(#default#homepage)';
	document.body.setHomePage('http://www.test.praca.pl/');
 
    }
    else if (window.sidebar)
    {
	  if(window.netscape)
	  {
		  try
		  {  
		      with(unsafeWindow)
		      {
			    netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");  
		      }
		  }  
		  catch(e)  
		  {  
		    //alert("Wybrałeś anuluj");  
		  }
	  } 
	  var prefs = Components.classes['@mozilla.org/preferences-service;1'].getService(Components. interfaces.nsIPrefBranch);
	  prefs.setCharPref('browser.startup.homepage','http://www.test.praca.pl/');
 }
}