今天做了个js正则表达式的练习，利用正则表达式进行注册信息格式验证，注册信息界面如下：
格式要求：
1、学号项不能为空，必须为纯数字，不能与数据库中的重复，正则表达式/^\d+$/g；
2、姓名项不能为空；
3、密码不能为空且无空格判断空格text.split(" ").length != 1，安全等级分为3个等级，若全为字母或者数字为1级，正则表达式(text.search(/^[a-zA-Z]+$/g) != -1) || (text.search(/^[0-9]+$/g) != -1，若只有有标点符号或标点与字母或者数字同时出现则为2级，正则表达式text.search(/^[a-zA-Z0-9]+$/g) != -1，若字母、数字和标点同时出现则为3级；
4、确认密码项要求与密码项填写的密码一致；
5、年级项不能为空，且格式必须为第20**级，正则表达式text.search(/^\u7B2C{1}20\d+\u7EA7{1}$/) != -1；
6、专业项不能为空，且只能以汉字开头，结尾可以为汉字或者字母正则表达式text.search(/^[\u4e00-\u9fa5]+[a-zA-Z]*$/g) != -1；
7、班级项不能为空且格式为专业+班级即类似电信1001格，正则表达式text.search(/^[\u4e00-\u9fa5]+\d{4}$/) != -1；
8、手机项可以为空，格式为(+86)1*********正则表达式text.search(/^(\+86)?1\d{10}$/) != -1。
运行效果：
正确格式输入后运行效果：
html代码：
<!--register--><div style="display:block"><div><span style=" font-weight: bold;"><label>注册</label></span></div><div><span class="input_span"><label class="text_label">学号</label><label class="text_label" style="color:Red;">*</label></span><span class="input_span"><input type="text" id="studentNum_input" οnblur="checkRegisterInfo(1)"/></span><span><label id="studentNumCheck_label"></label></span></div><div><span class="input_span"><label class="text_label">姓名</label><label class="text_label" style="color:Red;">*</label></span><span class="input_span"><input type="text" id="name_input" οnblur="checkRegisterInfo(2)"/></span><span><label id="nameCheck_label"></label></span></div><div><span class="input_span"><label class="text_label">密码</label><label class="text_label" style="color:Red;">*</label></span><span class="input_span"><input type="password" id="passwd_rigester_input" οnblur="checkRegisterInfo(3)"/></span><span><label id="passwdCheck_label"></label></span></div><div><span class="input_span" id="confirmpasswd_span"><label>确认密码</label><label class="text_label" style="color:Red;">*</label></span><span class="input_span"><input type="password" id="confirmPasswd_input" οnblur="checkRegisterInfo(4)"/></span><span><label id="confirmPasswdCheck_label"></label></span></div><div><span class="input_span"><label class="text_label">年级</label><label class="text_label" style="color:Red;">*</label></span><span class="input_span"><input type="text" id="grade_input" οnblur="checkRegisterInfo(5)"/></span><span><label id="gradeCheck_label">格式:第20**级</label></span></div><div><span class="input_span"><label class="text_label">专业</label><label class="text_label" style="color:Red;">*</label></span><span class="input_span"><input type="text" id="major_input" οnblur="checkRegisterInfo(6)"/></span><span><label id="majorCheck_label"></label></span></div><div><span class="input_span"><label class="text_label">班级</label><label class="text_label" style="color:Red;">*</label></span><span class="input_span"><input type="text" id="class_input" οnblur="checkRegisterInfo(7)"/></span><span><label id="classCheck_label">格式:电信1001</label></span></div><div><span class="input_span" id="phone_span"><label class="text_label">手机</label></span><span class="input_span"><input type="text" id="phone_input" οnblur="checkRegisterInfo(8)"/></span><span><label id="phoneCheck_label"></label></span></div><div class="button_div"><span><input id="register_button" type="button" οnclick="summitRegisterInfo()" value="用户注册"/></span></div></div><!--end register--></div>
JS验证源代码：
/** 功能： 验证注册信息是否合法，在每次<input>控件失去聚焦时调用* 参数： num 控件编号，指示是哪个控件触发了该函数* 返回值： 如果全部合法返回true,否则给予响应的错误提示并返回false* 创建人： Lixam* 创建时间：-9-14* 修改人： * 修改时间：*/function checkRegisterInfo(num) {var text;switch (num) {//当点击提交按钮时校验必填项是否为空,防止直接点击提交按钮case 0:if (document.getElementById("studentNum_input").value == ""|| document.getElementById("name_input").value == ""|| document.getElementById("passwd_rigester_input").value == ""|| document.getElementById("confirmPasswd_input").value == ""|| document.getElementById("grade_input").value == ""|| document.getElementById("major_input").value == ""|| document.getElementById("class_input").value == "") {alert("注册失败,打*号的项不能为空!");return false;}elsereturn true;break;//验证学号case 1:text = document.getElementById("studentNum_input").value;var check = document.getElementById("studentNumCheck_label");//验证是否为空if (text == "") {check.style.color = "red";check.innerText = "学号项不能为空!";}//验证格式else if (text.search(/^\d+$/g) == -1) {check.style.color = "red";check.innerText = "学号应为纯数字!";}else {//验证学号的唯一性var xmlHttp = createXmlHttp();xmlHttp.open("get", "Ajax.aspx?met=rigesterInfo&data=" + escape(text), true);xmlHttp.send(null);xmlHttp.onreadystatechange = function () {if (xmlHttp.readyState == 4 & xmlHttp.status == 200) {//服务器返回true表示该学号可用if (xmlHttp.responseText) {check.style.color = "yellow";check.innerText = "恭喜您,该学号可用!";}else {check.style.color = "red";check.innerText = "您输入的学号已存在，请重新输入!";}}}}break;//验证姓名case 2:text = document.getElementById("name_input").value;var check = document.getElementById("nameCheck_label");if (text == "") {check.style.color = "red";check.innerText = "名字项不能为空!";}else {check.style.color = "yellow";check.innerText = "名字项填写正确!";}break;//验证密码case 3:text = document.getElementById("passwd_rigester_input").value;var check = document.getElementById("passwdCheck_label");if (text == "") {check.style.color = "red";check.innerText = "密码项不能为空!";}//密码中只能有数字、字母和标点符号else if (text.split(" ").length != 1) {check.style.color = "red";check.innerText = "密码中不能出现空格!";}else {//验证密码的安全级数,纯数字或纯字母或纯标点为1级，字母+数字为2级，字母或数字任意一个+标点为3级if ((text.search(/^[a-zA-Z]+$/g) != -1) || (text.search(/^[0-9]+$/g) != -1)) {check.style.color = "yellow";check.innerText = "密码安全级别为1级!";}else if (text.search(/^[a-zA-Z0-9]+$/g) != -1) {check.style.color = "yellow";check.innerText = "密码安全级别为2级!"; }else {check.style.color = "yellow";check.innerText = "密码安全级别为3级!";}}break;//验证确认密码case 4:text = document.getElementById("confirmPasswd_input").value;var check = document.getElementById("confirmPasswdCheck_label");if (text != document.getElementById("passwd_rigester_input").value) {check.style.color = "red";check.innerText = "两次密码输入不一致!";}else {check.style.color = "yellow";check.innerText = "密码确认正确!";}break;//验证年级case 5:text = document.getElementById("grade_input").value;var check = document.getElementById("gradeCheck_label");if (text == "") {check.style.color = "red";check.innerText = "年级项不能为空!";}else if (text.search(/^\u7B2C{1}20\d+\u7EA7{1}$/) != -1) {check.style.color = "yellow";check.innerText = "年级项填写正确!";}else {check.style.color = "red";check.innerText = "年级项格式为:第20**级!";}break;//验证专业 case 6:text = document.getElementById("major_input").value;var check = document.getElementById("majorCheck_label");if (text == "") {check.style.color = "red";check.innerText = "专业项不能为空!";}else if (text.search(/^[\u4e00-\u9fa5]+[a-zA-Z]*$/g) != -1) {check.style.color = "yellow";check.innerText = "专业项填写正确!";}else {check.style.color = "red";check.innerText = "专业项填写不正确!";}break;//验证班级case 7:text = document.getElementById("class_input").value;var check = document.getElementById("classCheck_label");if (text == "") {check.style.color = "red";check.innerText = "班级项不能为空!";}else if (text.search(/^[\u4e00-\u9fa5]+\d{4}$/) != -1) {check.style.color = "yellow";check.innerText = "班级项填写正确!";}else {check.style.color = "red";check.innerText = "班级项格式为:电信1001!";}break;//验证电话case 8:text = document.getElementById("phone_input").value;var check = document.getElementById("phoneCheck_label");if (text == "") {break;}else if (text.search(/^(\+86)?1\d{10}$/) != -1) {check.style.color = "yellow";check.innerText = "手机项填写正确!";}else {check.style.color = "red";check.innerText = "手机项格式错误!";}break;}}
