var str = '[{"uname":"王強","day":"2010/06/17"},{"uname":"王海雲","day":"2010/06/11"}]';
var jsonList=eval("("+str+")");
for(var i=0;i<jsonList.length;i++){
for(var key in jsonList[i]){
alert("key:"+key+",value:"+jsonList[i][key]);
}
}