本文实例为大家分享了jQuery密码强度验证控件，供大家参考，具体内容如下

<html>
  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
    <script type="text/javascript" src="jquery-1.12.1.js"></script>
    <style type="text/css">
      .mainPrompt {
        border: #999 solid 1px;
        border-radius: 13px;
        overflow: hidden;
        padding: 1px 2px;
        display: inline-block;
        height: 20px;
      }
      .listPrompt {
        float: left;
        height: 20px;
        width: 56px;
        margin-right: 2px;
        
      }
      .bot_text span {
        width: 52px;
        text-align: center;
        display: inline-block;
        line-height: 18px;
      }
    </style>
  </head>
  <body>
    <br/>
    <div>
      <p id="PromptMessage" style="margin-left: 200px;">
          新密码请至少使用字母、数字、符号两种<br/>类型组合的密码，长度为6~20位。</p>
      <input type="text" id="txtPassword" style="float: left;"/ placeholder="请输入密码">
      <div style="margin-left: 30px;font-size: 12px;float: left;">
        <div class="mainPrompt" align="center" bgcolor="#f5f5f5">
          <div class="listPrompt" id="strength_L" style="border-radius: 8px 0px 0px 8px;">
          </div>
          <div class="listPrompt" id="strength_M">
          </div>
          <div class="listPrompt" id="strength_H" style="margin-right: 0px;border-radius: 0 8px 8px 0;">
          </div>
        </div>
        <div class="bot_text">
          <span id="lowStrength">低</span> <span id="midStrength">
            中</span> <span id="highStrength">高</span>
        </div>
      </div>
    <div>
    <script type="text/javascript">
      function JudgyPwdLevel(pwdStr) {
        var hasNumber = 0;
        var hasLetter = 0;
        var hasSymbol = 0
        if (pwdStr.length >= 6) {
          for (var i = 0; i < pwdStr.length; i++) {
            var item = pwdStr[i];
            if (item >= '0' && item <= '9') { hasNumber = 1; }
            else if ((item >= 'a' && item <= "z") || (item >= 'A' && item < "Z")) { hasLetter = 1; }
            else { hasSymbol = 1; }
          }
        }
        return hasLetter + hasNumber + hasSymbol;
      }
      //显示颜色
      function pwStrength(pwd) {
        O_color = "#eeeeee";
        L_color = "#FF0000";
        M_color = "#FF9900";
        H_color = "#33CC00";
        if (pwd == null || pwd == '') {
          Lcolor = Mcolor = Hcolor = O_color;
        }
        else {
          S_level = JudgyPwdLevel(pwd);
          switch (S_level) {
            case 0:
              Lcolor = Mcolor = Hcolor = O_color;
            case 1:
              Lcolor = L_color;
              Mcolor = Hcolor = O_color;
              break;
            case 2:
              Lcolor = L_color;
              Mcolor = M_color;
              Hcolor = O_color;
              break;
            default:
              Lcolor = L_color;
              Mcolor = M_color;
              Hcolor = H_color;
          }
        }
        document.getElementById("strength_L").style.background = Lcolor;
        document.getElementById("strength_M").style.background = Mcolor;
        document.getElementById("strength_H").style.background = Hcolor;
        return;
      }
      $("#txtPassword").keyup(function(e){
       pwStrength($(e.target).val());
      });
 
    </script>
  </body>
</html>