each的使用【鸡蛋】

each的使用：

$.each(list,function(i,n){

 $('#SelTime').append("<option value='" + n + "'>" + n+ "</option>");
});

list  返回的json字符串
当json字符串为键值格式时：{"time0":"2007","time1":"2008","time2":"2009","time3":"2010","time4":"2011","time5":"2012","time6":"2013" }
i代表键，n代表值（i代表time0，n代表2007）



当json字符串为复杂格式时：如{t:[{"time0":"2007","time1":"2008","time2":"2009","time3":"2010","time4":"2011","time5":"2012","time6":"2013" }]}
i代表索引号，n代表元素;n["time0"]的值是2007
$.each(list.t,function(i,n){
 $('#SelTime').append("<option value='" + n["time"+i] + "'>" + n["time"+i]+ "</option>");

});

下面这种写法等价于第一种

$(list).each(function(i,n){

})