<! DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "HTTP://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd ">
<html xmlns="HTTP://www.jzread.com/1999/xhtml">
<head id="Head1" runat="server">
<title>密碼強度測試</title>
</head>
<script language="javascript" type="text/javascript">
//CharMode函數
//測試某個字元是屬於哪一類.
function CharMode(iN){
if (iN>=48 && iN <=57) //數位
return 1;
if (iN>=65 && iN <=90) //大寫字母
return 2;
if (iN>=97 && iN <=122) //小寫
return 4;
else
return 8; 特殊字元
}
//bitTotal函數
//計算出當前密碼當中一共有多少種模式
function bitTotal(num){
modes=0;
for (i=0;i<4;i++){
if (num & 1) modes++;
num>>>=1;
}
return modes;
}
//checkStrong函數
//返回密碼的強度級別
function checkStrong(sPW){
if (sPW.length<=4)
return 0; 密碼太短
Modes=0;
for (i=0;i<sPW.length;i++){
//測試每一個字元的類別並統計一共有多少種模式.
Modes|=CharMode(sPW.charCodeAt(i));
}
return bitTotal(Modes);
}
//pwStrength函數
//當使用者放開鍵盤或密碼輸入框失去焦點時,根據不同的級別顯示不同的顏色
function pwStrength(pwd){
O_color="#e0f0ff";
L_color="#FF0000";
M_color="#FF9900";
H_color="#33CC00";
if (pwd==null|| pwd==''){
Lcolor=Mcolor=Hcolor=O_color;
}
else
{
S_level=checkStrong(pwd);
//alert(S_level);
switch(S_level)
{
case 0:
Lcolor=Mcolor=Hcolor=O_color;
case 1:
Lcolor=L_color;
Mcolor=Hcolor=O_color;
break;
case 2:
Lcolor=Mcolor=M_color;
Hcolor=O_color;
break;
default:
Lcolor=Mcolor=Hcolor=H_color;
}
}
document.getElementById("strength_L").style.background=Lcolor;
document.getElementById("strength_M").style.background=Mcolor;
document.getElementById("strength_H").style.background=Hcolor;
return;
}
</script>
<body>
<form id="form1">
<div>
輸入密碼:<input type="text" id="TextBox1" onkeyup="pwStrength(this.value)" onblur="pwStrength(this.value)">< br>
密碼強度:
<table border="1" cellpadding="1" bordercolordark="#fdfeff" bordercolorlight="#99ccff"
cellspacing="1" style="width: 200px; display: inline; background-color: #e0f0ff">
<tr>
<td id="strength_L" style="width: 100px; height: 19px;" align="center">
弱
</td>
<td id="strength_M" style="width: 100px; height: 19px;" align="center">
中
</td>
<td id="strength_H" style="width: 100px; height: 19px;" align="center">
強
</td>
</tr>
</table>
</div>
</form>
</body>
</html>