Home > Website Builders > Front-end Technology

Simple JS Implementation detects user password security

Source: Internet
Author: User
Keywords Web page production Ajax javascript
Tags ajax document function html http javascript password password security
Developer on Alibaba Coud: Build your first app with APIs, SDKs, and tutorials on the Alibaba Cloud. Read more ＞

<! 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>
<meta http-equiv= "Content-type" content= "HTML; Charset=utf-8 "/>
<title> simple JS implementation to detect user password security </title>
<script language=javascript>
// The Charmode function
//tests which type of character is part of
function Charmode (in) {
if (in>=48 && in <=57)/number
return 1;
if (in>=65 && in <=90)//capital Letter
Return 2;
if (in>=97 && in <=122)//lowercase
return 4;
else
return 8;//special characters
}
//bittotal function
//The total number of modes
function bittotal (num) {
modes=0;
for (i=0;i<4;i++) {
if (num & 1) modes++;
Num>>>=1;
}
return modes;
}
//checkstrong function
//Return password strength level
function Checkstrong (sPW) {
if (spw.length<=4)
returns 0;//password Too short
Modes=0;
for (i=0;i<spw.length;i++) {
//test the category of each character and count the total number of modes
Modes|=charmode (Spw.charcodeat (i));
}
return Bittotal (Modes);
}
//pwstrength function
//When user releases keyboard or password input box loses focus, different colors appear according to different levels
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= ""
Enter Password: <input type= "password" onkeyup= "Pwstrength" (this.value) "onblur=" Pwstrength (this.value) "><br>
Password strength: <table width=" 217 "border=" 1 "cellspacing=" 0 "cellpadding=" 1 " Bordercolor= "#cccccc"
height= "style=" Display:inline
<tr align= "center" bgcolor= "#eeeeee" >
<td width= "33%" id= "strength_l" > Weak </td>
<td width= "33%" id= "strength_m" > </td>
<TD width= "33%" id= "Strength_h" > Strong </td>
</tr>
</table>
</form>
<p Style= "margin-top:50px;" > Find more code, please visit: <a href= "http://www.jzread.com" target= "_blank" > Web page Production tutorial </a></p>
</body>
</html>

This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to info-contact@alibabacloud.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

Related Keywords:
oracle performance management implementation and user guide node js simple server simple node js server backbone js simple example simple digital security system simple php password login php simple password protection
Related Article
The input box adapts automatically to the width
Ways to enable IE to support CSS3 fillet
css position usage and cause page deformation JS processing m...
IE8 text-align: center Left-sided solution
How far can DIV + CSS go?
Summarize the compatible code of Firefox and IE browser in CSS

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

Hot Article
Hot Tags
computing conference access forum computer class data get http html applications
Popular Keywords
direct digital landing development documentation data user director of marketing deploy it ddos how to description of products and services ddos information data website domain to dns

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

Get Started for Free

  • Sales Support

    1 on 1 presale consultation

    Chat Contact Sales

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

    Open a Ticket

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.

    Learn More