js 密码强度检测

<!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 id="Head1" runat="server"> 
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>密码强度</title> 
</head> 
<script language="javascript" type="text/javascript"> 
//CharMode函数 
//测试某个字符是属于哪一类. 
function CharMode(iN){
	if (iN>=48 && iN <=57) //数字 
		return 1; 
	if (iN>=65 && iN <=90) //大写字母 
		return 2; 
	if (iN>=97 && iN <=122) //小写 
		return 4; 
	else 
		return 8; //特殊字符 
} 
//bitTotal函数 
//计算出当前密码当中一共有多少种模式 
function bitTotal(num){ 
	modes=0; 
	for (i=0;i<4;i++){ 
		if (num & 1) modes++; 
		num>>>=1; 
	} 
	return modes; 
} 
//checkStrong函数 
//返回密码的强度级别 
function checkStrong(sPW){ 
	if (sPW.length<=4) 
		return 0; //密码太短 
	Modes=0; 
	for (i=0;i<sPW.length;i++){ 
		//测试每一个字符的类别并统计一共有多少种模式. 
		Modes|=CharMode(sPW.charCodeAt(i)); 
	} 
	return bitTotal(Modes); 
} 
//pwStrength函数 
//当用户放开键盘或密码输入框失去焦点时,根据不同的级别显示不同的颜色 
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); 
		//console.log(S_level); 
		switch(S_level) 
		{ 
			case 0: 
				Lcolor=Mcolor=Hcolor=O_color;
				break;
			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>
<style>
table td{ background:#E0F0FF;}
</style>
<body> 
<form id="form1">
    <div> 
        输入密码:
        <input type="password" id="TextBox1" onkeyup="pwStrength(this.value)" onblur="pwStrength(this.value)"><br> 
        密码强度: 
        <table border="0" cellpadding="0" bordercolordark="#fdfeff" bordercolorlight="#99ccff" cellspacing="0" 
style="width: 200px; display: inline; margin-top:2px;"> 
            <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">强</td> 
            </tr> 
        </table> 
    </div> 
</form> 
</body> 
</html>

js 密码强度检测,古老的榕树,5-wow.com

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