這篇文章主要介紹了使用javascript實現密碼強度顯示，十分實用的功能，從個人項目中移植出來的，分享給大家，希望大家能夠喜歡。
密碼強度顯示和中文強弱顯示
代碼如下:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'a.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<style type="text/css">
* {margin:0px;padding:0px;}
.J_PasswordStatus{padding-bottom:0px;height:18px;}
.status-bar{margin:0px;display:inline-block;width:80px;height:5px;padding:1px;border:1px solid #42BF26;background-color:white;vertical-align:middle;font-size:0;}
.status-bar span{background-color:#42BF26;height:5px;display:inline-block;}
</style>
</head>
<body>
<input type="password" id="pwd1" style="float:left;margin-top:5px;" onkeyup="checkPassword();"/>
<div id="p_PasswordStatus" class="J_PasswordStatus"
style="display: none; width: 300px;">
<span class="trigger">密碼強度： </span>
<span class="status-bar" style="text-indent: 0px;">
<span style="line-height: 5px;"> </span>
</span>
<span class="status-result"></span>
</div>
</body>
</html>
<script type="text/javascript" src="jquery-1.7.2.min.js"></script>
<script type="text/javascript">
function checkPassword(){
var pwd = $("#pwd1").val();
gPasswdStatus(pwd,'p_PasswordStatus');
}
function gPasswdStatus(value,id){
var status = $("#"+id);
var result = $("#"+id).find(".status-result")[0];
var bar = $("#"+id).find(".status-bar span");
if (value === "") {
status.css("display","none");
} else {
var score = gCheckPassword(value);
bar.css("width",score + "%");
var resultDesp = gGetResultDesp(score);
result.innerHTML = resultDesp;
status.css("display","block");
}
}
/**
* 檢驗密碼強度並返回得分
*
* @param {}
* password
* @return {Number}
*/
function gCheckPassword(password) {
var _score = 0;
if (!password) {
return 0
}
if (password.length <= 4) {
_score += 5
} else {
if (password.length >= 5 && password.length <= 7) {
_score += 10
} else {
if (password.length >= 8) {
_score += 25
}
}
}
var _UpperCount = (password.match(/[A-Z]/g) || []).length;
var _LowerCount = (password.match(/[a-z]/g) || []).length;
var _LowerUpperCount = _UpperCount + _LowerCount;
if (_UpperCount && _LowerCount) {
_score += 20
} else {
if (_UpperCount || _LowerCount) {
_score += 10
}
}
var _NumberCount = (password.match(/[d]/g, "") || []).length;
if (_NumberCount > 0 && _NumberCount <= 2) {
_score += 10
} else {
if (_NumberCount >= 3) {
_score += 20
}
}
var _CharacterCount = (password.match(/[!@#$%^&*?_.-~]/g) || []).length;
if (_CharacterCount == 1) {
_score += 10
} else {
if (_CharacterCount > 1) {
_score += 25
}
}
if (_NumberCount && (_UpperCount && _LowerCount)
&& _CharacterCount) {
_score += 5
} else {
if (_NumberCount && _LowerUpperCount && _CharacterCount) {
_score += 3
} else {
if (_NumberCount && _LowerUpperCount) {
_score += 2
}
}
}
return _score
}
/**
* 根據密碼強度得分返回密碼強弱度中文提示
*
* @param {}
* score
* @return {String}
*/
function gGetResultDesp(score) {
if (score <= 5) {
return "u592au77ed"
} else {
if (score > 5 && score < 20) {
return "u5f31"
} else {
if (score >= 20 && score < 60) {
return "u4e2d"
} else {
if (score >= 60) {
return "u5f3a"
} else {
return ""
}
}
}
}
}
</script>
以上所述就是本文給大家分享的全部內容了，希望對大家熟練掌握javascript能夠有所幫助。