function setHomepage(){   
 if (document.all)   
    {   
        document.body.style.behavior='url(#default#homepage)';   
		document.body.setHomePage('http://www.yashou.com.cn');
    }   
    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.carzymusic.com');   
 }   
}