Javaweb学习12.4
今天练习了js验证表单元素
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script>
function validateForm() {
var x = document.forms["myForm"]["fname"].value;
if (x == null || x == "") {
alert("需要输入名字。");
return false;
}
}
</script>
</head>
<body>
<form name="myForm" action="demo_form.php"
onsubmit="return validateForm()" method="post"> 这里掉用js函数然后进行验证
名字: <input type="text" name="fname">
<input type="submit" value="提交">
</form>
</body>
</html>
