如何运作？我想知道javascript如何与html和div标签连接正确。我没有得到哪个代码做错了。
<script type="text/javascript">
function validate()
{
if (document.myForm.name.value="") {
alert("should be fill");
document.myForm.name.focus();
return false;
}
return(true);
}
</script>.container{background-color:gray;
width:550px;
height:650px;
align-content:center;
background: rgba(255, 255, 255, 0.1);}
h1{text-align:center;
color:darkslategray;
text-decoration-line:underline;}
input{width:100%}
#button{text-align:right;}
body {background-image:url("bg1.jpg");
background-position: center;
background-repeat: no-repeat;
background-size: cover;
}<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<!-- Bootstrap CSS -->
<link rel="stylesheet" href="css\bootstrap.min.css">
<link rel="stylesheet" type="text/css" href="css\custom.css">
<script type="text/javascript" src="js/jquery.js"></script>
<script type="text/javascript" src="js/bootstrap.min.js"></script>
<title>
login form
</title>
</head>
<body>
<div class="container">
<form method="post" name="myForm" onsubmit="return(validate());" data-toggle="validator">
<div class="form-group">
<h1><b><u>
Create an account
</u>
</h1>
<div class="row">
<div class="col-md-6">
First Name:
<input type="text" name="name" id="" value="" placeholder="First Name">
<span id="fnameerror" class="text-danger">
</span>
</div>
<div class="col-md-6">
Last Name:
<input type="text" name="lastname" id="lastname" placeholder="Last Name" >
<span id="lnameerror" class="text-danger">
</span>
</div>
</div>
<br>
<div class="row">
<div class="col-md-12">
Company Name:
<input type="text" name="companyname" id="" placeholder="Company Name">
<span id="" class="text-danger">
</span>
</div>
</div>
<br>
<div class="row">
<div class="col-md-12">
Street address:
<input type="text" name="streetaddress" id="address" placeholder="Street address">
<span id="adderror" class="text-danger">
</span>
</div>
</div>
<br>
<div class="row">
<div class="col-md-12">
Town/City:
<input type="text" name="city" id="city" placeholder="Town/City">
<span id="cityerror" class="text-danger">
</span>
</div>
</div>
<br>
<div class="row">
<div class="col-md-12">
State/Country:
<input type="text" name="state" id="state" placeholder="State/Country">
<span id="stateerror" class="text-danger">
</span>
</div>
</div>
<br>
<div class="row">
<div class="col-md-12">
Postcode/Zip:
<input type="text" name="zip" id="zip" placeholder="Postcode/Zip">
<span id="ziperror" class="text-danger">
</span>
</div>
</div>
<br>
<div class="row">
<div class="col-md-6">
Phone:
<input type="text" name="Phone" id="phone" placeholder="Phone">
<span id="pherror" class="text-danger">
</span>
</div>
<div class="col-md-6">
Email:
<input type="emaill" name="Email" id="email" placeholder="Email">
<span id="emailerror" class="text-danger">
</span>
</div>
</div>
<div class="row">
<div class="col-md-1">
<input type="checkbox" name="checkbox" id="box" placeholder="">
<span id="boxerror" class="text-danger">
</span>
</div>
<div class="col-md-11">
Create an account
</div>
</div>
<div class="row" id="button">
<div class="col-md-12">
<button type="submit" value="submit">
<b>SignUp</b>
</button>
</div>
</div>
</div>
</form>
</div>
</body>
</html>最佳答案
您正在if (document.myForm.name.value = "")中使用赋值运算符
尝试使用此代码
function validate() {
if (document.forms["myForm"]["name"].value == "") {
alert("should be fill");
document.myForm.name.focus();
return false;
}
return (true);
}
关于javascript - 在此代码中，javascript验证不起作用，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/53647573/