<head>
<title>层测试</title>
<script type="text/javascript">
var PasswordStrength ={
Level : ["极佳","一般","较弱","太短"],//强度提示信息
LevelValue : [15,10,5,0],//和上面提示信息对应的强度值
Factor : [1,2,5],//强度加权数,分别为字母，数字，其它
KindFactor : [0,0,10,20],//密码含几种组成的权数
Regex : [/[a-zA-Z]/g,/\d/g,/[^a-zA-Z0-9]/g] //字符，数字，非字符数字（即特殊符号）
}
PasswordStrength.StrengthValue = function(pwd)
{
var strengthValue = 0;
var ComposedKind = 0;
for(var i = 0 ; i < this.Regex.length;i++)
{
var chars = pwd.match(this.Regex[i]);//匹配当前密码中符合指定正则的字符，如果有多个字符以','分隔
if(chars != null)
{
strengthValue += chars.length * this.Factor[i];
ComposedKind ++;
}
}
strengthValue += this.KindFactor[ComposedKind];
return strengthValue;
}
PasswordStrength.StrengthLevel = function(pwd)
{
var value = this.StrengthValue(pwd);
for(var i = 0 ; i < this.LevelValue.length ; i ++)
{
if(value >= this.LevelValue[i] )
return this.Level[i];
}
}
function loadinputcontext(o)
{
var showmsg=PasswordStrength.StrengthLevel(o.value);
switch(showmsg)
{
case "太短": showmsg+=" <img src='images/level/1.gif' width='88' height='11' />";
break;
case "较弱": showmsg+=" <img src='images/level/2.gif' width='88' height='11' />";
break;
case "一般": showmsg+=" <img src='images/level/3.gif' width='88' height='11' />";
break;
case "极佳": showmsg+=" <img src='images/level/4.gif' width='88' height='11' />";
break;
}
document.getElementById('showmsg').innerHTML = showmsg;
}
</script>
</head>
<body>
<form ></span>
</form>
</body>
</html>