效果如下：
輸入密碼:
密碼強度:
弱
中
強
代碼如下：
復制代碼 代碼如下:
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<!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 runat="server">
<title>無標題頁</title>
</head>
<mce:script language="javascript" type="text/javascript"><!--
//CharMode函數
//測試某個字符是屬於哪一類.
function CharMode(iN){
if (iN>=48 && iN <=57) //數字
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; //特殊字符
}
//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++){
//測試每一個字符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
//當用戶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);
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;
}
// --></mce:script>
復制代碼 代碼如下:
<body>
<form id="form1" runat="server">
<div>
輸入密碼:<asp:TextBox ID="TextBox1" runat="server" onKeyUp=pwStrength(this.value) onBlur=pwStrength(this.value) ></asp:TextBox><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>
