JS 循环遍历JSON数据

<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>

或

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); 
alert(data[o]); 
  alert("text:"+data[o].name+" value:"+data[o].age ); 
  }