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codestrong.html
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codestrong.html
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<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>無標題文件</title>
<script language=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.www.qichepeijian.com
//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="#eeeeee";
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;
}
</script>
</head>
<body>
<form name="form1" action="" >
<table width="400" border="0">
<tr>
<td width="25%">輸入密碼：</td>
<td width="75%"><input type="password" size="40" onKeyUp="pwStrength(this.value)" onBlur="pwStrength(this.value)"> </td>
</tr>
<tr>
<td>密碼強度：</td>
<td>
<table width="300" border="1" bordercolor="#cccccc" height="23">
<tr bgcolor="#eeeeee">
<td width="100" id="strength_L">弱</td>
<td width="100" id="strength_M">中</td>
<td width="100" id="strength_H">強</td>
</tr>
</table>
</td>
</tr>
<tr>
<td>溫馨提示：</td>
<td>密碼至少需要4個字符，並且最好包含數字，字母（大小寫都有）與特殊符號。 </td>
</tr>
</table>
</form>
</body>
</html>