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>