Javascript基本表单验证

<script type="text/javascript">
    function checkForm(form) {
        if (form.name.value == "") {
            alert("姓名不能为空！");
            return false;
        }
        if (form.password.value.length < 6||form.password.value.length > 13) {
            alert("密码长度应在6-13之间！");
            return false;
        }
        if (form.age.value<0||form.age.value>120) {
            alert("请输入正确的年龄！");
            return false;
        }
        
        if (form.email.value.match(/^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/)==null) {
            alert("请输入正确的邮箱！");
            return false;
        }
        
    }
</script>