记住：给那个id添加事件，例如给type="button" id="submit"

添加绑定onclick或者click，必须再页面加载完里面填写才有效

 不错的案例：https://www.cnblogs.com/web-wjg/p/7894657.html

  // <input class="btn btn-primary" type="button" id="tijiao" value="提交" />

 js:------->         

1:

 <input class="btn btn-default" type="submit" onclick="return tijiao()" value="重置" />
            function tijiao() {
                return true;
            }

2:

 window.onload = function () {
                document.getElementById("anniu").onclick = function () {
                    document.getElementById("form").submit();

                }
            }

//

 jq:------->

            $(function () {//给按钮绑定点击事件，必须写加载完后
                $("#tijiao").click(function () {
                    if (Username() && ageCheck() && qqCheck() && emailCheck()) {
                        $("#form").submit();
                    }

                });
            });

            function tiaozhuan() {
                window.location.href = 'list.php';
            }
            function Username() {
                var name = $("#name").val();
                var reg_name = /^[u4e00-u9fa5]+$/;
                if (!reg_name.test(name)) {
                    alert("你输入的名字不是中文，请输入中文")
                    return false;
                }
                return true;
            }
            //
            function ageCheck() {
                var age = $("#age").val();
                var reg_age = /^[0-9]{1,2}$/;
                if (reg_age.test(age)) {
                    if (age > 100 || age < 0 || age == null || age.toString().length == 0 || age == 0) {
                        alert("你输入的年龄不符合实际")
                        return false;
                    } else {
                        return true;
                    }

                } else {
                    alert("你输入的年龄不符合实际")
                    return false;
            &nb;   }

<!----______---->

 <script language="javascript">
    //表单提交
    function submit1(obj){
        obj.submit();
    }
    </script>

                                          _onclick事件调用方法

1. <form id="form1" name="form1" method="post" action="mzwucom.asp">  
2.       UserNmae:  
3.       <input name="username" type="text" id="username" size="10" maxlength="10" />  
4.       <input type="button" name="Submit" value="提交" onclick="submit1(this.form);" />  
5.     </form>  

<!----______---->