验证密码强度的js
代码 1 <script type="text/javascript">
2 function CharMode(iN){
3 if (iN>=48 && iN <=57)
4 return 1;
5 if (iN>=65 && iN <=90)
6 return 2;
7 if (iN>=97 && iN <=122)
8 return 4;
9 else
10 return 8;
11 }
12 function bitTotal(num){
13 modes=0;
14 for (i=0;i<4;i++){
15 if (num & 1) modes++;
16 num>>>=1;
17 }
18 return modes;
19 }
20
21 function checkStrong(sPW){
22 if (sPW.length<=4)
23 return 0;
24 Modes=0;
25 for (i=0;i<sPW.length;i++){
26 Modes|=CharMode(sPW.charCodeAt(i));
27 }
28 return bitTotal(Modes);
29 }
30 function pwStrength(pwd){
31 O_color="#eeeeee";
32 L_color="#FF0000";
33 M_color="#FF9900";
34 H_color="#33CC00";
35 if (pwd==null||pwd==''){
36 Lcolor=Mcolor=Hcolor=O_color;
37 }
38 else{
39 S_level=checkStrong(pwd);
40 switch(S_level) {
41 case 0:
42 Lcolor=Mcolor=Hcolor=O_color;
43 case 1:
44 Lcolor=L_color;
45 Mcolor=Hcolor=O_color;
46 break;
47 case 2:
48 Lcolor=Mcolor=M_color;
49 Hcolor=O_color;
50 break;
51 default:
52 Lcolor=Mcolor=Hcolor=H_color;
53 }
54 }
55 document.getElementById("strength_L").style.background=Lcolor;
56 document.getElementById("strength_M").style.background=Mcolor;
57 document.getElementById("strength_H").style.background=Hcolor;
58 return;
59 }
60 </script>
61
62 </head>
63 <body>
64 <form id="form1" runat="server">
65 <div>
66 <input id="Password1" type="password" onkeyup="pwStrength(this.value)" />
67 <table style="display: inline" bordercolor="#cfe8fe" height="20 " cellspacing="0"
68 cellpadding="1" width="160" border="1">
69 <tr>
70 <td>
71 </td>
72 </tr>
73 <tr align="center" bgcolor="#ffffff">
74 <td width="33%" id="strength_L">
75 弱
76 </td>
77 <td width="33%" id="strength_M">
78 中
79 </td>
80 <td width="33%" id="strength_H">
81 强
82 </td>
83 </tr>
84 </table>
85 </div>
86 </form>
87 </body>
88 </html>
2 function CharMode(iN){
3 if (iN>=48 && iN <=57)
4 return 1;
5 if (iN>=65 && iN <=90)
6 return 2;
7 if (iN>=97 && iN <=122)
8 return 4;
9 else
10 return 8;
11 }
12 function bitTotal(num){
13 modes=0;
14 for (i=0;i<4;i++){
15 if (num & 1) modes++;
16 num>>>=1;
17 }
18 return modes;
19 }
20
21 function checkStrong(sPW){
22 if (sPW.length<=4)
23 return 0;
24 Modes=0;
25 for (i=0;i<sPW.length;i++){
26 Modes|=CharMode(sPW.charCodeAt(i));
27 }
28 return bitTotal(Modes);
29 }
30 function pwStrength(pwd){
31 O_color="#eeeeee";
32 L_color="#FF0000";
33 M_color="#FF9900";
34 H_color="#33CC00";
35 if (pwd==null||pwd==''){
36 Lcolor=Mcolor=Hcolor=O_color;
37 }
38 else{
39 S_level=checkStrong(pwd);
40 switch(S_level) {
41 case 0:
42 Lcolor=Mcolor=Hcolor=O_color;
43 case 1:
44 Lcolor=L_color;
45 Mcolor=Hcolor=O_color;
46 break;
47 case 2:
48 Lcolor=Mcolor=M_color;
49 Hcolor=O_color;
50 break;
51 default:
52 Lcolor=Mcolor=Hcolor=H_color;
53 }
54 }
55 document.getElementById("strength_L").style.background=Lcolor;
56 document.getElementById("strength_M").style.background=Mcolor;
57 document.getElementById("strength_H").style.background=Hcolor;
58 return;
59 }
60 </script>
61
62 </head>
63 <body>
64 <form id="form1" runat="server">
65 <div>
66 <input id="Password1" type="password" onkeyup="pwStrength(this.value)" />
67 <table style="display: inline" bordercolor="#cfe8fe" height="20 " cellspacing="0"
68 cellpadding="1" width="160" border="1">
69 <tr>
70 <td>
71 </td>
72 </tr>
73 <tr align="center" bgcolor="#ffffff">
74 <td width="33%" id="strength_L">
75 弱
76 </td>
77 <td width="33%" id="strength_M">
78 中
79 </td>
80 <td width="33%" id="strength_H">
81 强
82 </td>
83 </tr>
84 </table>
85 </div>
86 </form>
87 </body>
88 </html>
