js密码强度检测

前端技术 2023/09/07 JavaScript

本文实例讲解了js密码强度检测的实现代码,分享给大家供大家参考,具体内容如下

运行效果图:

这段JavaScript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>
<title>JS判断密码强度</title>
<script language=javascript> 
//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; 
} 
</script>
</head>
<body> 
<form name=form1 action=\"\" > 
密码:<input type=password size=8 onKeyUp=pwStrength(this.value) onBlur=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>

这一款先看一看效果图。

具体内容:

<script>
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:\'\'});
 }
}
</script>

以上就是本文的全部内容,希望对大家学习javascript程序设计有所帮助。

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