密码强度检测

来源：互联网发布：留学互助联盟知乎编辑：程序博客网时间：2024/05/16 05:17

<html>
<head>
<title>密码强度检测</title>
<script type="text/javascript">
function chkpwd(obj){
var t=obj.value;
var id=getResult(t);

//定义对应的消息提示
var msg=new Array(4);
msg[0]="密码过短。";
msg[1]="密码强度差。";
msg[2]="密码强度良好。";
msg[3]="密码强度高。";

var sty=new Array(4);
sty[0]=-45;
sty[1]=-30;
sty[2]=-15;
sty[3]=0;

var col = new Array(4);
col[0] = "gray";
col[1] = "#50AEDD";
col[2] = "#FF8213";
col[3] = "green";

//设置显示效果
var bImg="http://images.cnblogs.com/cnblogs_com/tq0855n/pwdlen_dSIPeEGQWxfO.gif" //一张显示用的图片
var sWidth=300;
var sHeight=15;
var Bobj=document.getElementById("chkResult");

Bobj.style.fontSize="12px";
Bobj.style.color=col[id];
Bobj.style.width=sWidth + "px";
Bobj.style.height=sHeight + "px";
Bobj.style.lineHeight=sHeight + "px";
Bobj.style.background="url(" + bImg + ") no-repeat left " + sty[id] + "px";
Bobj.style.textIndent="20px";
Bobj.innerHTML="检测提示：" + msg[id];
}

//定义检测函数,返回0/1/2/3分别代表无效/差/一般/强
function getResult(s){
if(s.length < 4){
   return 0;
}
var ls = 0;
if (s.match(/[a-z]/ig)){
   ls++;
}
if (s.match(/[0-9]/ig)){
   ls++;
}
   if (s.match(/(.[^a-z0-9])/ig)){
   ls++;
}
if (s.length < 6 && ls > 0){
   ls--;
}
return ls
}
</script>
</head>
<body>
<form name="form1">
<label for="pwd">用户密码</label>
<input type="password" name="pwd" onkeyup="chkpwd(this)" />
<div id="chkResult"></div>
</form>
</body>
</html>