如何檢查表單是否爲空並且表單爲空然後將disabled="disabled"
設置爲提交按鈕?如何檢查表單是否爲空,如果表單爲空,則將disabled =「disabled」設置爲提交按鈕?
<form action="/contact/" method="POST" id="form">
<input type="text" id="name" name="name" class="form-control" placeholder="Name">
<input type="email" id="email" name="email" class="form-control" placeholder="E-Mail">
<textarea name="msg" id="msg" class="form-control" rows="4" placeholder="Message"></textarea>
<input type="submit" value="Send" class="button-contac-send">
</form>