<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title></title>
<style>
#dv {
background-color: #fafafa;
position: absolute;
left: 200px;
top: 200px;
width: 500px;
height: 200px;
}
.strong0 {
background-color: #ffffff;
width: 150px;
height: 10px;
border: 1px dashed #cccccc;
border-radius: 10%;
}
.strong1 {
background-color: green;
width: 50px;
height: 10px;
border: 1px dashed palevioletred;
border-radius: 10%;
}
.strong2 {
background-color: #DB192A;
width: 100px;
height: 10px;
border: 1px dashed palevioletred;
border-radius: 10%;
}
.strong3 {
background-color: blue;
width: 150px;
height: 10px;
border: 1px dashed palevioletred;
border-radius: 10%;
}
</style>
</head>
<body>
<div id="dv">
<label for="pwd">请输入密码</label>
<input type="text" name="密码框" id="pwd"/>
<div>
<em>密码强度</em>
<div id="strong" class="strong0"></div>
</div>
</div>
<script>
var keyupobj=document.getElementById("pwd");
var stobj=document.getElementById("strong");
keyupobj.onkeyup=function(){
//密码字符数大于6才会改变颜色
if(this.value.length>=6){
stobj.className="strong"+getlev(this.value);
}else{
stobj.className="strong0";
}
};
//判断表单中的级别
function getlev(pwd){
var lev=0;
if(/[0-9]/.test(pwd)){
lev++;
}
if(/[a-zA-Z]/.test(pwd)){
lev++;
}
if(/[^0-9a-zA-Z]/.test(pwd)){
lev++;
}
return lev;
}
</script>
</body>
</html>
image.png
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