js密码强度检验的教程

 

 #passStrength{height:6px;width:120px;border:1px solid #ccc;padding:2px;}

 .strengthLv1{background:red;height:6px;width:40px;}

 .strengthLv2{background:orange;height:6px;width:80px;}

 .strengthLv3{background:green;height:6px;width:120px;}

 密码强度：

new PasswordStrength('pass','passStrength');

js 代码如下：

复制代码

functionPasswordStrength(passwordID,strengthID){

 this.init(strengthID);

 var_this =this;

 document.getElementById(passwordID).onkeyup =function(){

 _this.checkStrength(this.value);

 }

};

PasswordStrength.prototype.init =function(strengthID){

 varid = document.getElementById(strengthID);

 vardiv = document.createElement('div');

 varstrong = document.createElement('strong');

 this.oStrength = id.appendChild(div);

 this.oStrengthTxt = id.parentNode.appendChild(strong);

};

PasswordStrength.prototype.checkStrength =function(val){

 varaLvTxt = ['','低','中','高'];

 varlv = 0;

 if(val.match(/[a-z]/g)){lv++;}

 if(val.match(/[0-9]/g)){lv++;}

 if(val.match(/(.[^a-z0-9])/g)){lv++;}

 if(val.length < 6){lv=0;}

 if(lv > 3){lv=3;}

 this.oStrength.className ='strengthLv'+ lv;

 this.oStrengthTxt.innerHTML = aLvTxt[lv];

};