实例：

//验证手机号码        function Checkthis() {            var txtmobile = document.getElementById("txtMobile").value;            var reg = new RegExp("(^0{0,1}1[3|4|5|6|7|8|9][0-9]{9}$)");            if (reg.test(txtmobile)) {                    return true;            }            else {                $.jBox.error("您输入的手机号码有误，请重新输入！", "温馨提示");                document.getElementById("txtMobile").value = "";                return false;            }        }        //验证邮箱        function CheckMail() {            var txtMail = document.getElementById("txtEmail").value;            var reg = new RegExp("^([a-zA-Z0-9]+[_|\_|\.]?)*[a-zA-Z0-9]+@([a-zA-Z0-9]+[_|\_|\.]?)*[a-zA-Z0-9]+\.[a-zA-Z]{2,3}$");            if (reg.test(txtMail)) {                return true;            }            else {                $.jBox.error("您输入的联系邮箱有误，请重新输入！", "温馨提示");                document.getElementById("txtEmail").value = "";                return false;            }        }