Anonymous
public text v1 · immutable<html>
<title></title>
<script>
function validate(form, input) {
if (document.forms[form].elements[input].value == "") {
document.forms[form].elements[input].focus();
alert ("Nepovolený počet osob");
return false;
}
return true;
}
</script>
<form method="post" onSubmit="validate(0,0);">
<input type="number" id="number"><br>
<button>Send</button>
</form>
</html>