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 | 复制代码 |
<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; oInput.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]) } };
//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> |