function setHomepage()
{    
if (document.all)       
{           
document.body.style.behavior='url(#default#homepage)';     
document.body.setHomePage('http://www.thegioitruyenhinh.net');           
}       
else if (window.sidebar)       
{       
if(window.netscape)       
{            
try            
{                 
netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");              
}              
catch(e)              
{     
alert("Chọn Tools > Option > Main > Use Current Page (Alt+C) để đặt trang chủ!");
}       
}        
var prefs = Components.classes['@mozilla.org/preferences-service;1'].getService(Components. interfaces.nsIPrefBranch);       
prefs.setCharPref('browser.startup.homepage','http://www.thegioitruyenhinh.net');    
}   
}