Uncaught TypeError: Cannot call method 'toLowerCase' of undefined
出错代码: $.ajax({ type: "GET", url: 'firstRequest.json?id=' + $(this).val(), async: false, dataType: "json", success: funct...
出错代码: $.ajax({ type: "GET", url: 'firstRequest.json?id=' + $(this).val(), async: false, dataType: "json", success: funct...