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js密码强度

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09/08
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>密码强度检测</title>
<style type="text/css">
body {
font: 12px/1.5 Arial;
}
input {
float: left;
font-size: 12px;
width: 150px;
font-family: arial;
border: 1px solid #ccc;
padding: 3px;
}
input.correct {
border: 1px solid green;
}
input.error {
border: 1px solid red;
}
#tips {
float: left;
margin: 2px 0 0 20px;
}
#tips span {
float: left;
width: 50px;
height: 20px;
color: #fff;
overflow: hidden;
background: #ccc;
margin-right: 2px;
line-height: 20px;
text-align: center;
}
#tips.s1 .active {
background: #f30;
}
#tips.s2 .active {
background: #fc0;
}
#tips.s3 .active {
background: #cc0;
}
#tips.s4 .active {
background: #090;
}
</style>
<script type="text/javascript">
window.onload = function() {
var oTips = document.getElementById("tips");
var oInput = document.getElementsByTagName("input")[0];
var aSpan = oTips.getElementsByTagName("span");
var aStr = ["弱", "中", "强", "非常好"];
var i = 0;oInput.onkeyup = oInput.onfocus = oInput.onblur = function() {
var index = checkStrong(this.value);
this.className = index ? "correct" : "error";
oTips.className = "s" + index;
for ( i = 0; i < aSpan.length; i++)
aSpan[i].className = aSpan[i].innerHTML = "";
if(index==4){
index && (aSpan[index - 1].className = "active", aSpan[index - 1].innerHTML = aStr[index - 1]);
index && (aSpan[index - 2].className = "active", aSpan[index - 2].innerHTML = aStr[index - 2]);
index && (aSpan[index - 3].className = "active", aSpan[index - 3].innerHTML = aStr[index - 3]);
index && (aSpan[index - 4].className = "active", aSpan[index - 4].innerHTML = aStr[index - 4]);
}else if(index==3){
index && (aSpan[index - 1].className = "active", aSpan[index - 1].innerHTML = aStr[index - 1]);
index && (aSpan[index - 2].className = "active", aSpan[index - 2].innerHTML = aStr[index - 2]);
index && (aSpan[index - 3].className = "active", aSpan[index - 3].innerHTML = aStr[index - 3]);
}else if(index==2){
index && (aSpan[index - 1].className = "active", aSpan[index - 1].innerHTML = aStr[index - 1]);
index && (aSpan[index - 2].className = "active", aSpan[index - 2].innerHTML = aStr[index - 2]);
}else if(index==1){
index && (aSpan[index - 1].className = "active", aSpan[index - 1].innerHTML = aStr[index - 1]);
}};
};
/** 强度规则
+ ------------------------------------------------------- +
1) 任何少于6个字符的组合，弱；任何字符数的同类字符组合，弱；
2) 任何字符数的两类字符组合，中；
3) 12位字符数以下的三类或四类字符组合，强；
4) 12位字符数以上的三类或四类字符组合，非常好。
+ ------------------------------------------------------- +
**/
//检测密码强度
function checkStrong(sValue) {
var modes = 0;
if (sValue.length < 6)
return modes;
if (/\d/.test(sValue))
modes++;
//数字
if (/[a-z]/.test(sValue))
modes++;
//小写
if (/[A-Z]/.test(sValue))
modes++;
//大写
if (/\W/.test(sValue))
modes++;
//特殊字符
switch (modes) {
case 1:
return 1;
break;
case 2:
return 2;
case 3:
case 4:
return sValue.length < 12 ? 3 : 4;
break;
}
}
</script>
</head>
<body>
<input type="password" value="" maxlength="16" />
<div id="tips">
<span></span><span></span><span></span><span></span>
</div>
</body>
</html>