JS HTML DOM: フォーム検証 Form Validation

フォームにおけるGUIのデータ入力が正しいかJavaScriptで検証を行い、間違い入力に警告を出す。

サンホテル
予約フォーム

First Name 名前

Last Name 姓

Room Type ルームタイプ

Meal Plan 食事プラン

Check-in day チェックイン日

Arrival time 到着時刻

Check-out day チェックアウト日

The window.location object can be used to get the current page address(URL) and to redirect the browser to a new page.

The window.screen object contains information about the user 's screen.

項目を選んで例題を見てください。

The window object allows execution of code at specified time intervals.These time intervals are called timing events.

setTimeout(function, milliseconds): Executes a function, after waiting a specified number of milliseconds.
setInterval(function, milliseconds): Same as setTimeout(), but repeats the execution of the function continuously.

The setTimeout() and setInterval() are both methods of the HTML DOM Window object.