js密码强度

 1 /*
 2 *密码安全程度 
 3 *return 1 ：全部为字母或者数字,或者密码长度小于6
 4 *return 2 : 字母数字组成，或者字母特殊字符，或者数字和特殊字符
 5 *return 3 : 字母和数字和特殊字符
 6 */
 7 String.prototype.passwordStrength=function(){
 8     if(this.length>0 && this.length<=6) return 1;
 9     var n1 = (this.search(/[a-zA-Z]/) != -1) ? 1 : 0,
10     n2 = (this.search(/[0-9]/) != -1) ? 1 : 0,
11     n3 =(this.search(/[\~\`\!\@\#\$\%\^\&\*\(\)\_\+\-\=\[\]|{\}\;\'\:\"\,\.\/\<\>\?]{1,}/) != -1) ? 1 : 0; 
12     return n1+n2+n3;
13 }

demo

 1 <!doctype html>
 2 <html>
 3 
 4 <head>
 5 <meta charset="utf-8">
 6 <title>js密码强度</title>
 7 <style type="text/css">
 8 .pw_letter{ margin-top:5px; font-size: 12px; }
 9 .pw_letter label{float: left; margin-right:10px; cursor: default; font-size: 12px; line-height: 16px;;}
10 .pw_letter span{ float: left; display:inline-block; width:30px; height:16px; line-height:16px; text-align:center; color:#FFF; background-color:#ccc; border-left: 1px solid #FFF;}
11 .pw_letter span.pw_strength_color{ background-color:green;}
12 
13 </style>
14 </head>
15 
16 <body>
17 
18 <input id="password" type="password" name="password" placeholder="密码" onKeyUp="setPasswordStrength(this.value.trim())">
19 <div class="pw_letter"><label>安全程度</label> <span class="strength">弱</span> <span class="strength">中</span> <span class="strength">强</span> </div>
20 
21 
22 <script type="text/javascript">
23 /*
24 *密码安全程度 
25 *return 1 ：全部为字母或者数字,或者密码长度小于6
26 *return 2 : 字母数字组成，或者字母特殊字符，或者数字和特殊字符
27 *return 3 : 字母和数字和特殊字符
28 */
29 String.prototype.passwordStrength=function(){
30     if(this.length>0 && this.length<=6) return 1;
31     var n1 = (this.search(/[a-zA-Z]/) != -1) ? 1 : 0,
32     n2 = (this.search(/[0-9]/) != -1) ? 1 : 0,
33     n3 =(this.search(/[\~\`\!\@\#\$\%\^\&\*\(\)\_\+\-\=\[\]|{\}\;\'\:\"\,\.\/\<\>\?]{1,}/) != -1) ? 1 : 0; 
34     return n1+n2+n3;
35 }
36 
37 String.prototype.trim = String.prototype.trim || function(){
38     return this.replace(/^\s+|\s+$/g,"");
39 }
40 
41 function setPasswordStrength(pwd){
42     var strength_span = document.getElementsByClassName("strength");
43     for(var i=0; i<strength_span.length; i++){
44         strength_span.item(i).className="strength"; 
45     }
46     for(var i=0; i<pwd.passwordStrength(); i++){
47         document.getElementsByClassName("strength").item(i).className="strength pw_strength_color";
48     }    
49 }
50 
51 
52 </script>
53 </body>
54 
55 </html>

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