function change_option(number,index)
{
  for(var i = 1; i <= number; i++) 
  {
    if(document.getElementById("tit"+i).className =="tit_b")
    {
      document.getElementById("tit"+i).className = "";
    }
    document.getElementById("tit"+index).className = "tit_b";
  }
  
  for(var j=1;j<= number;j++)
  {
  	  if(document.getElementById("sub_"+j).style.display=="block")
	  {
	    document.getElementById("sub_"+j).style.display ="none";
	  }
	  document.getElementById("sub_"+index).style.display ="block";
  }
  
}

function AddFavorite(sURL, sTitle)
{
    try
    {
        window.external.addFavorite(sURL, sTitle);
    }
    catch (e)
    {
        try
        {
            window.sidebar.addPanel(sTitle, sURL, "");
        }
        catch (e)
        {
        	alert("加入收藏夹失败！");
        }
    }
}


function hiddensub(number,index)
{
  for(var i = 1; i <= number; i++) 
  {
    if(document.getElementById("tit"+i).className =="tit_b")
	{
      document.getElementById("tit"+i).className = "";
    }
      document.getElementById("tit"+index).className = "";
  }
  
  for(var j=1;j<= number;j++)
  {
  	  if(document.getElementById("sub_"+j).style.display=="block")
	  {
	  document.getElementById("sub_"+j).style.display ="none";
	  }
	  document.getElementById("sub_"+index).style.display ="none";
	  document.getElementById("sub_"+1).style.display ="block";
  }
}
function SetHome(obj,vrl){
        try{
                obj.style.behavior='url(#default#homepage)';obj.setHomePage(vrl);
        }
        catch(e){
                if(window.netscape) {
                        try {
                                netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");
                        }
                        catch (e) {
                        	alert("加入收藏夹失败！");
                        }
                        var prefs = Components.classes['@mozilla.org/preferences-service;1'].getService(Components.interfaces.nsIPrefBranch);
                        prefs.setCharPref('browser.startup.homepage',vrl);
                 }
        }
}