正则表达式初运用之认证界面的实现代码

!DOCTYPE html>
html>
head>
meta charset="utf-8">
meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
title>Examples/title>
meta name="description" content="">
meta name="keywords" content="">
link href="" rel="stylesheet">
/head>
body>
form action="" name="form1">
table>
tr>
td>用户名/td>
td>input type="text" name="input1" onblur="check1()"/>/td>td>div id="div1" style="color:red">/div>/td>
/tr>
tr>
td>密码/td>
td>input type="password" name="input2" onblur="check2()"/>/td>td>div id="div2" style="color:red">/div>/td>
/tr>
tr>
td>再次输入密码/td>
td>input type="password" name="input3" onblur="check3()"/>/td>td>div id="div3" style="color:red">/div>/td>
/tr>
tr>
td>请输入邮政编码/td>
td>input type="text" name="input4" onblur="check4()"/>/td>td>div id="div4" style="color:red">/div>/td>
/tr>
tr>
td>输入手机号码/td>
td>input type="text" name="input5" onblur="check5()"/>/td>td>div id="div5" style="color:red">/div>/div>/td>
/tr>
tr>
td> 邮箱地址/td>
td>input type="text" name="input6" onblur="check6()"/>/td>td>div id="div6" style="color:red">/div>/td>
/tr>
tr>
td>生日/td>td>input type="text" name="input7" onclick="check7()"/>/td>td>div id="div7" style="color:red">/div>/td>
/tr>
tr>td>input type="submit" value="完成注册" onclick="sub()">/td>/tr>
/table>
/form>
script type="text/javascript">
var p = false;
function check1() {
var reg=/^[a-zA-Z][a-zA-Z0-9]{3,15}$/;
var div1=document.getElementById("div1");
if(!reg.test(document.form1.input1.value)){
div1.innerHTML="用户名必须是4-16字母或数字组成且以字母开始";
}else{
div1.innerHTML="√";
return true;
}
}
function check2() { 
var reg=/[a-zA-Z0-9]{4,10}/;
var div2=document.getElementById("div2");
if(!reg.test(document.form1.input2.value)){
div2.innerHTML="密码只能由英文字母和数字组成，长度为4-10个字符";
}else{
div2.innerHTML="√";
return true;
}
}
function check3() {
var div3=document.getElementById("div3");
if(document.form1.input3.value==0){
div3.innerHTML="请再次输入密码";
}else if(document.form1.input3.value!=document.form1.input2.value){
div3.innerHTML="密码不一致";
}else {
div3.innerHTML="√";
return true;
}
}
function check4() {
var reg=/^\d{6}$/;
var div4=document.getElementById("div4");
if(!reg.test(document.form1.input4.value)){
div4.innerHTML="邮政编码必须是6个数字";
}
else{
div4.innerHTML="√";
return true;
}
}
function check5() {
var reg=/^1\d{10}$/;
var div5=document.getElementById("div5");
if(!reg.test(document.form1.input5.value)){
div5.innerHTML="手机号必须是11个数字且1开始";
}else{
div5.innerHTML="√";
return true;
}
}
function check6() {
var reg=/^[a-zA-Z][a-zA-Z0-9_]+@([a-zA-Z0-9]+.)+(com|cn)$/;
var div6=document.getElementById("div6");
if(!reg.test(document.form1.input6.value)){
div6.innerHTML="邮箱地址不是这种格式";
}else{
div6.innerHTML="√";
return true;
}
}
function check7() {
var reg=/^(\d{4})-(\d{1,2})-(\d{1,2})$/;
var div7=document.getElementById("div7");
var arr=reg.exec(document.form1.input7.value);
if(arr==null){
div7.innerHTML="生日格式为1980-05-12或1988-05-04的形式";
}else if (arr[1]1900||arr[1]>2016) {
div7.innerHTML="生日必须在1900-2014";
}else if (arr[2]1||arr[2]>12) {
div7.innerHTML="生日的月份在01~12之间";
}else if (arr[3]1||arr[3]>31) {
div7.innerHTML="生日的日期必须在01-31之间";
}else {
div7.innerHTML="√";
p = true;
}
}
function sub(){
if(check1()==truep==true check2()==truecheck3()==truecheck4()==truecheck5()==truecheck6()==true){
alert("注册成功");
}else{
alert("注册失败，你还有信息没填或不符合格式");
}
}
/script>
/body>
/html>