「javaScript」disabledで要素を無効化する
htmlコード
<form name="userFrm" action="xxx">
<input name="username" type="text" >
<button name="send">送信</button>
</form>
<form name="userFrm" action="xxx">
<input name="username" type="text" >
<button name="send">送信</button>
</form>
<form name="userFrm" action="xxx"> <input name="username" type="text" > <button name="send">送信</button> </form>
JSコード
let fs = document.forms.userFrm;
fs.send.disabled = true;
let fs = document.forms.userFrm;
fs.send.disabled = true;
let fs = document.forms.userFrm; fs.send.disabled = true;