我试图autofocus输入按钮单击,但它不起作用.代码可在此处找到以供编辑:https://www.w3schools.com/code/tryit.asp？filename = FPPCFP5RTU9E
<input type="text" id="myText" autofocus>
<button onclick="myFunction()">Focus Input</button>
<p id="demo"></p>
<script>
function myFunction() {
document.getElementById("myText").autofocus = true;
}
</script>是否有更简单的方法在下面的插入 SQL 命令中使用name和phone变量？
字符串插值是一种方法，但我不知道如何实现。
String name = textBox1.Text;
String phone = textBox2.Text;
var query = "insert into Customer_info(Customer_Name,Customer_Phone) " +
"values('" + name + "','" + phone + "');";
SqlCommand com = new SqlCommand(query,con);
try {
con.Open();
com.ExecuteNonQuery();
con.Close();
}
catch (Exception Ex) {
con.Close();
}
我正在使用
在bootstrap popover data-content属性中打破行,但它不起作用.怎么可能？还有可能在其中做出一些大胆的内容吗？
$(document).ready(function(){
$('[data-toggle="popover"]').popover();
}); <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script></script>
<div class="container">
<a href="#" title="Header" data-toggle="popover" data-trigger="hover" data-content="Hello, i need 
 to break line.">hover me</a>
</div>可以检查变量数组是否包含完全数字1,0,0,1吗？
例如,
var array = [1,0,0,1];
if (array === 1001) alert("success");
我正在尝试gender为所有输入添加一个公共类.然后我比较,如果他们没有检查,并提醒空.如何正确检查所有按钮是否都已检查？
$( ".btn" ).click(function( event ) {
event.preventDefault;
if( !$('input .gender').is(":checked") ) alert(" empty");
});<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<form>
<input class="gender" type="radio" name="answer[1]" value="male"> Male<br>
<input class="gender" type="radio" name="answer[1]" value="female"> Female<br>
<input class="gender" type="radio" name="answer[1]" value="other"> Other<br>
<br><br>
<input class="gender" type="radio" name="answer[2]" value="PHP"> PHP<br>
<input class="gender" type="radio" name="answer[2]" value="Pyhon"> Python<br>
<input class="gender" type="radio" name="answer[2]" value="Java"> Java<br>
<input class="btn" type="submit" value="check">
</form>