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	javascript 密码强度验证程序代码
我们会在很多网站注册时会提示你密码强度,那么密码强度是怎么实现的呢?下面我来给各位同学介绍js中 密码强度验证程序有需要了解的朋友可参考。
我们先来看强度规则:
1) 任何少于6个字符的组合,弱;任何字符数的同类字符组合,弱;
2) 任何字符数的两类字符组合,中;
3) 12位字符数以下的三类或四类字符组合,强;
4) 12位字符数以上的三类或四类字符组合,非常好,代码如下:
- <head>
 - <title>密码强度检测</title>
 - <style type="text/css">
 - body { font: 12px/1.5 Arial; }
 - input{ float: left;font-size: 12px; width: 150px;font-family: arial; border: 1px solid #ccc; padding: 3px;}
 - input.correct{ border: 1px solid green; }
 - input.error{border: 1px solid red;}
 - #tips{float: left; margin: 2px 0 0 20px; }
 - #tips span {float: left; width: 50px; height: 20px; color: #fff;overflow: hidden;background: #ccc;margin-right: 2px;line-height: 20px; text-align: center;}
 - #tips.s1 .active { background: #f30; }
 - #tips.s2 .active {background: #fc0; }
 - #tips.s3 .active {background: #cc0;}
 - #tips.s4 .active {background: #090; }
 - </style>
 - <script type="text/javascript">
 - window.onload = function () {
 - var oTips = document.getElementById("tips");
 - var oInput = document.getElementsByTagName("input")[0];
 - var aSpan = oTips.getElementsByTagName("span");
 - var aStr = ["弱", "中", "强", "非常好"];
 - var i = 0;
 - oInputoInput.onkeyup = oInput.onfocus = oInput.onblur = function () {
 - var index = checkStrong(this.value);
 - this.className = index ? "correct" : "error";
 - oTips.className = "s" + index;
 - for (i = 0; i < aSpan.length; i++) aSpan[i].className = aSpan[i].innerHTML = "";
 - index && (aSpan[index - 1].className = "active", aSpan[index - 1].innerHTML = aStr[index - 1]) } };
 - //xiaohuboke.com
 - //检测密码强度
 - function checkStrong(sValue) {
 - var modes = 0;
 - if (sValue.length < 6) return modes;
 - if (/d/.test(sValue)) modes++; //数字
 - if (/[a-z]/.test(sValue)) modes++; //小写
 - if (/[A-Z]/.test(sValue)) modes++; //大写
 - if (/W/.test(sValue)) modes++; //特殊字符
 - switch (modes) {
 - case 1:
 - return 1;
 - break;
 - case 2:
 - return 2;
 - case 3:
 - case 4:
 - return sValue.length < 12 ? 3 : 4
 - break; } }
 - </script>
 - </head>
 - <body>
 - <input type="password" value="" maxlength="16" /> <div id="tips">
 - <span></span><span></span><span></span><span></span>
 - </div>
 - </body>