版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/qq_32965187/article/details/83929700
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
<script type="text/javascript">
function buttonAlert () {
/* 弹框 */
// alert("别点我了。");
/* 改变控件内容 */
var pid = document.getElementById("xia");
pid.innerHTML = "<a href='#'>hello1111</a>";
}
function checkForm()
{
var username = document.getElementById("username");
var uName = username.value;
/* 校验用户名 */
if(uName.length<6)
{
alert("用户名不能小于六位");
return false;
}
/* 校验邮箱 */
var email = document.getElementById("email")
var uEmail = email.value;
if(!(/^[a-z0-9]+([._\\-]*[a-z0-9])*@([a-z0-9]+[-a-z0-9]*[a-z0-9]+.){1,63}[a-z0-9]+$/.test(uEmail)))
{
alert("邮箱不匹配")
return false ;
}
return true ;
}
</script>
</head>
<body>
<input type="button" value="按钮" onclick="buttonAlert()"/>
<p id="xia">123</p>
<form action="#" onsubmit="return checkForm()" >
用户名:<input type="text" id="username" /><br />
密码:<input type="password" id="password" /><br />
邮箱:<input type="text" id="email" /><br />
<input type="submit" value="提交" />
</form>
</body>
</html>