使用jQuery如何写一个含验证码的登录界面

<div id="divID"> <div style="background-color:transparent;">  <form id="ff" method="post">   <ul class="reg-box">    <li>     <label for="">账 号</label>     <input type="text" name="accName" value="" class="account" maxlength="11" style="color:#999;" onBlur="textBlur(this)" onFocus="textFocus(this)"/>     <span class="error error5"></span>    </li>    <li>     <label for="">密 码</label>     <input type="password" name="accPassWord" class="admin_pwd" value="" style="color:#999;" onBlur="textBlur(this)" onFocus="textFocus(this)"/>     <span class="error error6"></span>    </li>    <li>     <label for="">验证码</label>     <input type="text" class="sradd photokey" id="key" value="" style="color:#999;ime-mode:disabled;-webkit-ime-mode:inactive;" onBlur="textBlur(this)" onFocus=" textFocus(this) " />     <span class="add phoKey"></span>     <span class="error error7"></span>    </li>   </ul>   <div class="sub">    <input type="submit" value="立即登录"/>   </div>  </form> </div></div>

//文本框默认提示文字function textFocus(el) { if (el.defaultValue == el.value) { el.value = ''; el.style.color = '#333'; }}function textBlur(el) { if (el.value == '') { el.value = el.defaultValue; el.style.color = '#999'; }}$(function(){ /*生成验证码*/ create_code(); //登录页面的提示文字 //账户输入框失去焦点 (function login_validate(){  $(".reg-box .account").blur(function(){   //reg=/^1[3|4|5|8][0-9]/d{4,8}$/i;//验证手机正则(输入前7位至11位)   if( $(this).val()==""|| $(this).val()=="请输入您的账号")   {    $(this).addClass("errorC");    $(this).next().html("账号不能为空！");    $(this).next().css("display","block");    $(".sub input").prop('disabled', true);   }//    else if($(".reg-box .account").val().length<11)//    {//     $(this).addClass("errorC");//     $(this).next().html("账号长度有误！");//     $(this).next().css("display","block");//    }//    else if(!reg.test($(".reg-box .account").val()))//    {//     $(this).addClass("errorC");//     $(this).next().html("账号不存在!");//     $(this).next().css("display","block");//    }   else   {    $(".sub input").prop('disabled', false);    $(this).addClass("checkedN");    $(this).removeClass("errorC");    $(this).next().empty();   }  });  /*密码输入框失去焦点*/  $(".reg-box .admin_pwd").blur(function(){   //reg=/^[/@A-Za-z0-9/!/#/$/%/^/&/*/./~]{6,22}$/;   if($(this).val() == ""){    $(this).addClass("errorC");    $(this).next().html("密码不能为空！");    $(this).next().css("display","block");    $(".sub input").prop('disabled', true);   }//    else if(!reg.test($(".admin_pwd").val())) {//     $(this).addClass("errorC");//     $(this).next().html("密码为6~12位的数字、字母或特殊字符！");//     $(this).next().css("display","block");//    }   else {    $(".sub input").prop('disabled', false);    $(this).addClass("checkedN");    $(this).removeClass("errorC");    $(this).next().empty();   }  });  /*验证码输入框失去焦点*/  $(".reg-box .photokey").blur(function(){   var code1=$('.reg-box input.photokey').val().toLowerCase();   var code2=$(".reg-box .phoKey").text().toLowerCase();   if(code1!=code2)   {    $(this).addClass("errorC");    $(this).next().next().html("验证码输入错误!!!");    $(this).next().next().css("display","block");    $(".sub input").prop('disabled', true);   }   else   {    $(".sub input").prop('disabled', false);    $(this).removeClass("errorC");    $(this).next().next().empty();    $(this).addClass("checkedN");   }  }) })();});

function create_code() { function shuffle() {  var arr = ['1', 'r', 'Q', '4', 'S', '6', 'w', 'u', 'D', 'I', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p',   'q', '2', 's', 't', '8', 'v', '7', 'x', 'y', 'z', 'A', 'B', 'C', '9', 'E', 'F', 'G', 'H', '0', 'J', 'K', 'L', 'M', 'N', 'O', 'P', '3', 'R',   '5', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z'];  return arr.sort(function () {   return (Math.random() - .5);  }); }; shuffle(); function show_code() {  var ar1 = '';  var code = shuffle();  for (var i = 0; i < 6; i++) {   ar1 += code[i];  }  ;  //var ar=ar1.join('');  $(".reg-box .phoKey").text(ar1); }; show_code(); $(".reg-box .phoKey").click(function () {  show_code(); });}

body{ background: #000;}#divID {  position: fixed;  left: 47%;  top: 53%;  width: 500px;  margin-left: -200px;  margin-top: -150px;  font-family: "黑体";  /*禁止复制粘贴*/  -moz-user-select: none;  -webkit-user-select: none;  user-select:none;  color:#fff; } .register_dialog_info {  float: left;  margin-left:10px;  color: #fff;  margin-top: 5px;  font-size: 20px; } form{padding: 20px 0px;} ul li {list-style: none;} .sub {  text-align: center; } .sub input {  display: inline-block;  width: 300px;  background-color: #012246;  color: rgb(255, 255, 255);  font-size: 20px;  text-align: center;  height: 40px;  line-height: 40px;  font-family: 黑体;  outline: none;  border: none;  margin: auto;  border-radius: 10px; } input[type = "submit"]:hover{cursor: pointer;} .reg-box { padding-left: 30px; } .reg-box li { line-height: 44px; width: 500px; overflow: hidden; } .reg-box li label { width: 68px; height: 50px; float: left; line-height: 50px; text-align: right; padding-right: 20px; } .reg-box li input,.reg-box li select{ border-radius: 3px; padding: 6px 0; font-size: 16px; width: 296px; height: 49px; line-height: 28px; border: 1px solid #dddddd; text-indent: 0.5em; float: left; } .reg-box li select option{font-size:16px;} /*验证码*/ .add { width: 128px; height: 44px; float: left; _display: inline; cursor: pointer; margin-left: 20px; } .reg-box li .sradd { width: 148px; text-indent: 4px; font-size: 14px; } .reg-box li .input-code { width: 106px; padding: 10px; font-family: Arial; font-style: italic; color: red; letter-spacing: 1px; cursor: pointer; text-align: center; text-indent: 0; } .yzm,.phoKey { background: #012246; text-align: center; line-height: 44px; color: #fff; border-radius: 3px;} .phoKey{letter-spacing: 3px; font-size:18px;} .yzmc { background: #dddddd; text-align: center; line-height: 44px; color: #999; } .error { clear:both;display:block;color: red; padding-left: 90px; padding-bottom:5px;height:20px;float: left; font-size:12px;line-height: 20px;} input { background-color: #fff; outline: none; } .reg-box li { width: auto; } .reg-box li input.errorC, .errorC{ border: 1px solid blue; } .reg-box li input.checkedN , .checkedN{ border: 1px solid #1ece6d; }