var sina={$:function(objName){
    if(document.getElementById){
      return eval("document.getElementById(\""+objName+"\")");
    }else {
      return eval("document.all."+objName);
    }
  },isIE:navigator.appVersion.indexOf("MSIE")!=-1?true:false,addEvent:function(l,i,I){
    if(l.attachEvent){
      l.attachEvent("on"+i,I);
    }else {
      l.addEventListener(i,I,false);
    }
  }};