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JS simple implementation of user registration information verification Code _JAVASCRIPT skills

Source: Internet
Author: User
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Register.html

Copy Code code as follows:

<! DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 transitional//en" "Http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd ">
<meta http-equiv= "Content-type" content= "text/html; Charset=utf-8 "/>
<title> User Registration </title>
<style type= "Text/css" >
@import "Css/userregister.css";
</style>
<body id= "Body" >
<div id= "Div_form" >
<form method= "post" action= "url" >
<table id= "Table" >
<tbody>
<tr>
<td> User name:</td>
<td>
<input name= "username" id= "username" type= "text" onfocus= "Showdesc (This)" onblur= "Checktext (This)"/>
</td>
</tr>
<tr>
<td> Password:</td>
<td>
<input name= "password" id= "password" type= "text" onfocus= "Showdesc (This)" onblur= "Checktext (This)"/>
</td>
</tr>
<tr>
<td> Confirm Password:</td>
<td>
<input name= "Password2" id= "PASSWORD2" type= "text" onfocus= "Showdesc (This)" onblur= "Checktext (This)"/>
</td>
</tr>
<tr>
<td> ID Number:</td>
<td>
<input name= "IDNumber" id= "IDNumber" type= "text" onfocus= "Showdesc (This)" onblur= "Checktext (This)"/>
</td>
</tr>
<tr>
<td> Phone number:</td>
<td>
<input name= "PhoneNumber" id= "PhoneNumber" type= "text" onfocus= "Showdesc (This)" onblur= "Checktext (This)"/>
</td>
</tr>
<tr>
<td>Email:</td>
<td>
<input name= "Email" id= "email" type= "text" onfocus= "Showdesc (This)" onblur= "Checktext (This)"/>
</td>
</tr>
<tr>
<td> </td>
&LT;TD align= "Right" >
<input type= "Submit" value= "Confirm Submission"/>
</td>
</tr>
</tbody>
</table>
<table id= "TABLE2" border= "0" >
<tr><td><span id= "username" > Please enter user name </span></td></tr>
<tr><td><span id= "Password" > Please enter password </span></td></tr>
<tr><td><span id= "Password2" > Please enter your password again </span></td></tr>
<tr><td><span id= "IDNumber" > Please enter your ID number </span></td></tr>
<tr><td><span id= "PhoneNumber" > Please enter phone number </span></td></tr>
<tr><td><span id= "Email" > Please enter your email address </span></td></tr>
</table>
</form>
</div>
<script type= "Text/javascript" src= "Jslib/registercheck.js" >
</script>
</body>

Registercheck.js

Copy Code code as follows:

When the input box gets focus, the prompt is displayed
function Showdesc (obj)
{
var id= obj.name;
document.getElementById (ID). style.display= "inline";
}

Verify that the input is valid when the input box loses focus
function Checktext (obj)
{
Get the ID value of the input box
var id= obj.name;
var Text=document.getelementbyid (id.tostring (). toUpperCase ()). Value;

To determine if it is empty
if (Text.replace (/\s/g, "") = "")
{
document.getElementById (ID). innerhtml= "Input cannot be empty";
}
Else
{
Assembly method
Convert first letter to uppercase, remaining unchanged
var firstchar=id.charat (0). toString (). toUpperCase ();
//
var strsub=id.substring (1,id.length);
var strmethod= "Check" +firstchar+strsub+ "()";
var isTrue = eval (strmethod);
if (isTrue)
{
document.getElementById (ID). innerhtml= "Input valid";
}
}


}

function Checkusername ()
{
Simply judge the length of the user name
var id = document.getElementById ("USERNAME");
var Username=id.value;
if (Username.length > 10)
{
document.getElementById (id.name). InnerHTML = "The user name entered is too long";
return false;
}
Else
return true;
}
function Checkpassword ()
{
var password = document.getElementById ("password"). Value;
return true;
}
function CheckPassword2 ()
{
var Id=document.getelementbyid ("PASSWORD");
var Id2=document.getelementbyid ("PASSWORD2");
var password = id.value;
var password2 = Id2.value;
if (PASSWORD!=PASSWORD2)
{
document.getElementById (id.name). innerhtml= "Inconsistent passwords";
return false;
}
return true;
}
function Checkidnumber ()
{
var Id=document.getelementbyid ("IDNUMBER");
var IDNumber =id.value;
if (idnumber.length<18| | IDNUMBER.LENGTH&GT;19)
{
document.getElementById (id.name). innerhtml= "The length of the ID card number is incorrect";
return false;
}
var expr=/([0]{18}[x|y]?) | ([1]{18}[x|y]?) /I;
if (Expr.test (IDNumber))
{
document.getElementById (id.name). innerhtml= "ID number may not be all ' 0 ' or all ' 1 '";
return false;
}
return true;
}
function Checkphonenumber ()
{
Match input data with regular expressions
var Id=document.getelementbyid ("PhoneNumber");
var phone = Id.value;
Match to a non-numeric character, return false
var expr =/\d/i;
if (expr.test (phone))
{
document.getElementById (id.name). Innerhtml= "Cannot enter non-numeric characters";
return false;
}
return true;

}
function Checkemail ()
{
Match input data with regular expressions
var id = document.getElementById ("EMAIL")
var email = id.value;
To start with a letter or number, followed by an @, alphanumeric ending with. com
var expr =/^ ([0-9]|[ A-z]) +@ ([0-9]|[ A-z]) + (\.[ C][O][M]) $/i;
if (!expr.test (email))
{
document.getElementById (id.name). innerhtml= "Input mailbox format is incorrect";
return false;
}
return true;
}

Css

Copy Code code as follows:

@charset "Utf-8";
/* CSS Document * *
#BODY {
Text-align:center;
}

#TABLE {
Text-align:left;
Margin:auto;
Float:left;
}
#DIV_FORM {
margin-left:300px;
}
#TABLE2 {
Text-align:left;
width:150px;
height:150px;
}
#TABLE2 TR
{
height:24px;
}
#TABLE2 span{
Display:none;
}

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