function addFavorite()
{
 if (document.all)
    {
       window.external.addFavorite('http://www.cn-petct.com','PET-CT健康网');
    }
    else if (window.sidebar)
    {
       window.sidebar.addPanel('http://www.cn-petct.com','PET-CT健康网', "");
 }
 //return false;
}

function setHomepage()
{
 if (document.all)
    {
        document.body.style.behavior='url(#default#homepage)';
  		document.body.setHomePage('http://www.cn-petct.com');
 
    }
    else if (window.sidebar)
    {
    if(window.netscape)
    {
         try
      {  
            netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");  
         }  
         catch (e)  
         {  
    alert( "该操作被浏览器拒绝，如果想启用该功能，请在地址栏内输入 about:config,然后将项 signed.applets.codebase_principal_support 值该为true" );  
         }
    } 
    var prefs = Components.classes['@mozilla.org/preferences-service;1'].getService(Components. interfaces.nsIPrefBranch);
    prefs.setCharPref('browser.startup.homepage','http://www.cn-petct.com');
 }
}

function document.oncontextmenu(){event.returnValue=false;}// R 
function window.onhelp(){return false} // F1 
function document.onkeydown() 
{ 
 if ((window.event.altKey)&&((window.event.keyCode==37)|| // Alt+ ← 
  (window.event.keyCode==39))) {event.returnValue=false;} // Alt+ →
 if ((event.keyCode==8) || // Backspace 
  (event.keyCode==116)|| // F5  
  (event.keyCode==122)|| // F11
  (event.ctrlKey && event.keyCode==67)|| // Ctrl+C
  (event.ctrlKey && event.keyCode==78)|| // Ctrl+N
  (event.ctrlKey && event.keyCode==82)|| // Ctrl+R
  (event.shiftKey && event.keyCode==121)) // Shift+F10
  {
  event.keyCode=0; 
  event.returnValue=false; 
  } 
 if ((window.event.altKey)&&(window.event.keyCode==115)) // Alt+F4 
  {
  window.showModelessDialog("about:blank","","dialogWidth:1px;dialogheight:1px"); 
  return false; 
  } 
}