我想确保用户在能够选择单选按钮之前在文本字段中输入文本。如果网关字段为空,请提醒用户他们没有在字段中输入任何内容并返回。如何检查是否输入文本框以允许用户选择单选按钮javascript
这是我到目前为止有:
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<body>
<div id="gatewayInput">
\t <form>
\t <input type="text" name="gateway" placeholder="Gateway Name"><br><br>
</form>
</div>
<div class="box1">
<form method="post" action="javascript:alert('Success')" onsubmit="validate()">
<label class="col">Air/Ground</label>
<span class="col">
<input type="radio" name="option" id="r1" value="1" />
<label for="r1">Air</label>
<input type="radio" name="option" id="r2" value="2" />
<label for="r2">Ground</label>
</span>
<span class="col">
<input type="submit" class="button"/>
</span>
</form>
</div>
<script src ="../../../jqueryDir/jquery-3.2.1.min.js"></script>
<script type="text/javascript">
function validate() {
\t if ((document.getElementsByName("gateway")[0].value == '')) {
\t \t alert('Response required');
\t \t return false;
\t }
else {
\t \t alert('Sucess');
\t \t return true;
\t }
}
console.log("this is my value:" + document.getElementsByName("gateway")[0].value);
$(".button").click(function(event){
if (validate() == true) {
event.preventDefault();
$.ajax({
url:"testexec.php",
type: "POST",
data: {option: $('input[type=radio]:checked').val()},
dataType: "text",
success:function(result){
$('#div1').html(result)
}
});
}
});
</script>
<div id="div1"></div>
</body>
我不认为这部分工作,它似乎要叫我的验证功能:
<form method="post" action="javascript:alert('Success')" onsubmit="validate()">
而且我很检查提交,有没有办法在此之前提醒用户?就像当他们点击单选按钮时,提醒他们留言?
不,那没用。我仍然没有弹出空白文本框的提醒 – kkmoslehpour