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>