join解析和遍历

第一种解析：

<script type="text/javascript">var date = '{"user":"admin","pass":"123123"}';var json = eval("("+ date +")");alert(json.user)alert(json.pass)</script>

第二种解析：

<script type="text/javascript">var date = '{"user":"admin","pass":"123123"}';var json = JSON.parse(date);alert(json.user)alert(json.pass)</script>

第一种遍历：

<script type="text/javascript">var date = '{"user":"admin","pass":"123123"}';var json = eval("("+ date +")");for(i in json){alert(json[i])}</script>

第二种遍历：

<script type="text/javascript">var date = '{"user":"admin","pass":"123123"}';var json = eval("("+ date +")");$.each(json,function(key,value){alert(key +"="+ value)});</script>