js循环便利json数据

 var data=[{name:"a",age:12},{name:"b",age:11},{name:"c",age:13},{name:"d",age:14}];
 for(var o in data){
     alert(o);//返回的是key
     alert(data[o]);//返回的key对应的value
     alert("text:"+data[o].name+" value:"+data[o].age );
 } 

 <script type="text/javascript">
 function text(){
 var json = {"options":"[{/"text/":/"王家湾/",/"value/":/"9/"},{/"text/":/"李家湾/",/"value/":/"10/"},{/"text/":/"邵家湾/",/"value/":/"13/"}]"}
    json = eval(json.options)
    for(var i=0; i<json.length; i++)
    {
        alert(json[i].text+" " + json[i].value)
    }
 }
 </script>