标签：username return 登录 value JS innerHTML password true 页面
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>登录界面</title>
<script type="text/javascript" src="js/login.js"></script>
</head>
<body>
<form method="post" action="LoginServlet" onsubmit="return valForm()">
<table>
<tr>
<td><label for="username">用户名:</label></td>
<td><input type="text" name="username" id="username" required="required" onblur="valname();"><span id="userErr"></span></td>
</tr>
<tr>
<td><label for="password">密 码:</label></td>
<td><input type="password" name="password" id="password" required="required" onblur="valpass();"><span id="passErr"></span></td>
</tr>
<tr>
<td></td>
<td><input type="submit" value="登录"><a href="register.html"><input type="button" value="去注册"></a></td>
</tr>
</table>
</form>
</body>
</html>
<script>
//验证用户名
function valname()
{
var username=document.getElementById("username");
var userErr=document.getElementById("userErr");
if(username.value.replace(/\s/g,"")=="")
{
userErr.innerHTML="用户名不能为空";
return false;
}else
{
username.value=username.value.replace(/\s/g,"");//除去空格
userErr.innerHTML="";
return true;
}
}
//验证密码
function valpass()
{
var password=document.getElementById("password");
var passErr=document.getElementById("passErr");
if(password.value.replace(/\s/g,"")=="")
{
passErr.innerHTML="密码不能为空";
return false;
}else
{
password.value=password.value.replace(/\s/g,"");//除去空格
passErr.innerHTML="";
return true;
}
}
//提交验证
function valForm()
{
if(valname()==true && valpass()==true)
{
return true;
}else
{
return false;
}
}
</script>
标签：username,
return,
登录,
value,
JS,
innerHTML,
password,
true,
页面
From： https://www.cnblogs.com/zhuhukang/p/16949545.html