第一个实例

这段 代码比较实用,它完成用户注册时判断用户输入密码的强度,分强、弱、中三等级,它可以根据用户输入的密码显示对应的密码强弱等级,方便用户改进输入。

实现代码:

<html>
<head>
< >JS判断密码强度</ >
<  language= > 
//判断输入密码的类型 
function CharMode(iN){ 
if (iN>=48 && iN <=57) //数字 
return 1; 
if (iN>=65 && iN <=90) //大写 
return 2; 
if (iN>=97 && iN <=122) //小写 
return 4; 
else 
return 8;  
} 
//bitTotal函数 
//计算密码模式 
function bitTotal(num){ 
modes=0; 
for (i=0;i<4;i++){ 
if (num & 1) modes++; 
num>>>=1; 
} 
return modes; 
} 
//返回强度级别 
function checkStrong(sPW){ 
if (sPW.length<=4) 
return 0; //密码太短 
Modes=0; 
for (i=0;i<sPW.length;i++){ 
//密码模式 
Modes|=CharMode(sPW.charCodeAt(i)); 
} 
return bitTotal(Modes); 
} 
  
//显示颜色 
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; 
} 
</ >
</head>
<body> 
<form name=form1 action=\"\" > 
密码:<input type=password size=8  =pwStrength(this.value)  =pwStrength(this.value)> 
<br>密码强度: 
<table width=\"210\" border=\"1\" cellspacing=\"0\" cellpadding=\"1\" bordercolor=\"#eeeeee\" height=\"22\" style=\'display:inline\'> 
<tr align=\"center\" bgcolor=\"#f5f5f5\"> 
<td width=\"33%\" id=\"strength_L\">弱</td> 
<td width=\"33%\" id=\"strength_M\">中</td> 
<td width=\"33%\" id=\"strength_H\">强</td> 
</tr> 
</table> 
</form>
</body>
</html>

在线运行

第二个实例:

<   >
function AuthPasswd(string) {
    if (string.length >= 6) {
        if (/[a-zA-Z]+/.test(string) && /[0-9]+/.test(string) && /\\W+\\D+/.test(string)) {
            noticeAssign(1);
        } else if (/[a-zA-Z]+/.test(string) || /[0-9]+/.test(string) || /\\W+\\D+/.test(string)) {
            if (/[a-zA-Z]+/.test(string) && /[0-9]+/.test(string)) {
                noticeAssign( - 1);
            } else if (/\\[a-zA-Z]+/.test(string) && /\\W+\\D+/.test(string)) {
                noticeAssign( - 1);
            } else if (/[0-9]+/.test(string) && /\\W+\\D+/.test(string)) {
                noticeAssign( - 1);
            } else {
                noticeAssign(0);
            }
        }
    } else {
        noticeAssign(null);
    }
}

function noticeAssign(num) {
    if (num == 1) {
        $(\'#weak\').css({
            backgroundColor: \'#009900\'
        });
        $(\'#middle\').css({
            backgroundColor: \'#009900\'
        });
        $(\'#strength\').css({
            backgroundColor: \'#009900\'
        });
        $(\'#strength\').html(\'很强\');
        $(\'#middle\').html(\'\');
        $(\'#weak\').html(\'\');
    } else if (num == -1) {
        $(\'#weak\').css({
            backgroundColor: \'#ffcc33\'
        });
        $(\'#middle\').css({
            backgroundColor: \'#ffcc33\'
        });
        $(\'#strength\').css({
            backgroundColor: \'\'
        });
        $(\'#weak\').html(\'\');
        $(\'#middle\').html(\'中\');
        $(\'#strength\').html(\'\');
    } else if (num == 0) {
        $(\'#weak\').css({
            backgroundColor: \'#dd0000\'
        });
        $(\'#middle\').css({
            backgroundColor: \'\'
        });
        $(\'#strength\').css({
            backgroundColor: \'\'
        });
        $(\'#weak\').html(\'弱\');
        $(\'#middle\').html(\'\');
        $(\'#strength\').html(\'\');
    } else {
        $(\'#weak\').html(\' \');
        $(\'#middle\').html(\' \');
        $(\'#strength\').html(\' \');
        $(\'#weak\').css({
            backgroundColor: \'\'
        });
        $(\'#middle\').css({
            backgroundColor: \'\'
        });
        $(\'#strength\').css({
            backgroundColor: \'\'
        });
    }
} < / >/

 

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