$(document).ready(function(){
     var id="" ;
     var tittle="" ;
     var keywords="" ;
     var description="" ;
     var str="";
     $("#title").append("");
   $.ajax({   
        type: "POST",       
         url: "HomeWzyh",       
         dataType: 'json', 
         success: function(json){  
          tittle=json.lv.tittle;
          keywords=json.lv.keywords;
          description=json.lv.description;
          id=json.lv.id;
          str+="<meta http-equiv=\"keywords\" content=\""+keywords+"\"/>";
          str+="<meta http-equiv=\"description\" content=\""+description+"\"/>";
          window.document.getElementById("title").innerHTML=str;  
          $(document).attr("title", tittle);
          
      }         
        });    
});