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Example code for JAVASCRIPT Verification Code (with effect diagram) _javascript tips

Source: Internet
Author: User
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The effect is as follows:

Copy Code code as follows:

<title></title>
<style type= "Text/css" >
. Code
{
Background:url (code_bg.jpg);
font-family:arial;
Font-style:italic;
Color:blue;
font-size:30px;
border:0;
PADDING:2PX 3px;
letter-spacing:3px;
Font-weight:bolder;
Float:left;
Cursor:pointer;
width:150px;
height:60px;
line-height:60px;
Text-align:center;
Vertical-align:middle;

}
A
{
Text-decoration:none;
font-size:12px;
Color: #288bc4;
}
A:hover
{
Text-decoration:underline;
}
</style>
<script language= "javascript" type= "Text/javascript" >

var code;
function Createcode () {
Code = "";
var codelength = 6; The length of the Verification code
var checkcode = document.getElementById ("Checkcode");
var codechars = new Array (0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
' A ', ' B ', ' C ', ' d ', ' e ', ' f ', ' g ', ' h ', ' I ', ' j ', ' K ', ' l ', ' m ', ' n ', ' o ', ' P ', ' Q ', ' R ', ' s ', ' t ', ' u ', ' V ', ' w ', ' x ', ' y ', ' z ',
' A ', ' B ', ' C ', ' D ', ' E ', ' F ', ' G ', ' H ', ' I ', ' J ', ' K ', ' L ', ' M ', ' N ', ' O ', ' P ', ' Q ', ' R ', ' S ', ' T ', ' U ', ' V ', ' W ', ' X ', ' Y ', ' Z '); All the candidate components of the verification code, of course, can also be used in Chinese
for (var i = 0; i < codelength; i++)
{
var charNum = Math.floor (Math.random () * 52);
Code + + Codechars[charnum];
}
if (Checkcode)
{
Checkcode.classname = "code";
checkcode.innerhtml = code;
}
}
function Validatecode ()
{
var inputcode = document.getElementById ("Inputcode"). Value;
if (inputcode.length <= 0)
{
Alert ("Please enter the verification code!") ");
}
else if (inputcode.touppercase ()!= code.touppercase ())
{
Alert ("The authentication code input is wrong!") ");
Createcode ();
}
Else
{
Alert ("Verify code is correct!) ");
}
}
</script>

<body onload= "Createcode ()" >
<form id= "Form1" runat= "Server" onsubmit= "Validatecode ()" >
<div>
<table border= "0" cellspacing= "5" cellpadding= "5" >
<tr>
<td></td><td> <div class= "code" id= "Checkcode" onclick= "Createcode ()" ></div></td >
<td><a href= "#" onclick= "Createcode ()" > can't see a replacement </a></td>
</tr>
<tr>
<td> Verification Code: </td><td><input style= "Float:left" type= "text" id= "Inputcode"/></td><td > Please enter the verification code </td>
</tr>
<tr><td></td><td><input id= "Button1" onclick= "Validatecode ();" type= "button" value= "OK" /></td><td></td>
</tr>
</table>
</div>
</form>
</body>

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:
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