 |
| Basic Concepts Of Internet
INTERNET DOMAIN
Each computer that has a permanent IP address, runs Server software and offers information to clients, is considered to be a Physical Domain i.e. a place (domain) where information is available.
The Physical Domain
All Internet Servers are connected to the Internet via an Internet Gateway. An Internet gateway is usually provided by one of the global networking giants that have setup these gateways. These networking giants are the companies who have spent enormous sums of money to set up the physical networks that circle the globe.
These physical networks are called the Internet Blackbone. The Internet backbone is a heterogeneous mix of networking technologies, which have been successfully implemented and currently fully operational.The networking giants are companies like British Telecom, Hyundai, AT&T etc.
INTERNET SERVER IDENTITIES
InterNIC, a quasi goverment body in the U.S.A registers and issues Internet Servers thair unique IP addresses.
InterNIC also authorizes organizations in other countries to issue IP addresses. In India, NCST (National center of Software Technology) a quasi goverment body is authorized to issue permanent IP addresses. This really means that the Internet Server must be located within India.
Registering A Virtual Domain With InterNIC
Log onto an InterNIC Server. Fill up a registeration from online. Pay the two-year registration fee to InterNIC. This registers a virtual domain with InterNIC.
Detailed Registeration will ask for information like Personal Details, Billing Contact Information, Technical Contact Information, and Administrative Contact Information and so on.
When a company registers a virtual domain name with InterNIC, InterNIC requires a unique IP address to be specified. The unique IP address specified, is generally the IP address of the Internet server, which will host the Virtual Domain.
InterNIC's address is http://www.internic.net/regist.html
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Thursday, 12 October 2017
basic concepts of internet
Thursday, 31 August 2017
update
update
1.COOKIES
=> SETTING A COOKIE
Syntax :
Set-cookie:NAME=value;EXPIRES=date;PATH=path;DOMAIN=domain;SECURE
The NAME=value is the only required piece of information that must be included in the set-cookie field .
All other entries are optional.
Example :
<html>
<head>
<script>
function newcookie(cookiename, value)
{
document.cookie=cookiename+"="+value;
}
</script>
</head>
<body>
<script>
document.write('<form>');
document.write('<table border="0" width="100%">');
document.write('<tr>');
document.write('<td width="25%">First Name</td>');
document.write('</tr>');
document.write('<tr>');
document.write('<td width="25%">First Name</td>');
document.write('<td width="25%">
<input type="text" name="first_nm" onBlur="newcookie(this.name,this.value);"
Size="20" type="text" value="'+cfirst_nm+'">
</td>');
document.write('</td>');document.write('</tr>');
document.write('</table>');
document.write('</form>');
</script>
</body>
</html>
2.VALIDATION
2.1 Field Name cannot be left empty
------------------------------
/* Cheking if the variable for Client's name is empty,(i.e.a blank Client's name field was submitted .) */
if(empty($_POST['txtName']))
{
/*returning data entry form if the Client's name is empty.*/
$alertmessage="<center>
Filed for Client\'s Name is empty!
</center>";
inclide("page2.php");
exit;
}
2.2 No double spacing in the field name captured
-----------------------------------------
=> To test double spacing validation,insert double spaces in between the Client Name and click submit button .
=> The PHP code checks the contents of Client Name field returned by the Browser. As it has double spacing,an error message is generated and stored in the variable $alertmessage.
ereg("([[:space:]]{2})",$_POST["txtName"]);
------------------------------------------------------------------------------
else
{
if(ereg("([[:space:]]{2})",$_POST["txtName"]))
{
/*
returning data entry form if the Client's name contains double spaces.
*/
$alertmessage="<center>
Double spaces found in Client\'s Name!
</center>";
inclide("page2.php");
exit;
}
}
--------------------------------------------------------------------------------------------------------
2.VALIDATION
2.1 Field Name cannot be left empty
2.1 Field Name cannot be left empty
------------------------------
/* Cheking if the variable for Client's name is empty,(i.e.a blank Client's name field was submitted .) */
if(empty($_POST['txtName']))
{
/*returning data entry form if the Client's name is empty.*/
$alertmessage="<center>
Filed for Client\'s Name is empty!
</center>";
inclide("page2.php");
exit;
}
2.2 No double spacing in the field name captured
-----------------------------------------
=> To test double spacing validation,insert double spaces in between the Client Name and click submit button .
=> The PHP code checks the contents of Client Name field returned by the Browser. As it has double spacing,an error message is generated and stored in the variable $alertmessage.
ereg("([[:space:]]{2})",$_POST["txtName"]);
------------------------------------------------------------------------------
else
{
if(ereg("([[:space:]]{2})",$_POST["txtName"]))
}
--------------------------------------------------------------------------------------------------------
if(empty($_POST['txtName']))
{
/*returning data entry form if the Client's name is empty.*/
$alertmessage="<center>
Filed for Client\'s Name is empty!
</center>";
inclide("page2.php");
exit;
}
2.2 No double spacing in the field name captured
-----------------------------------------
=> To test double spacing validation,insert double spaces in between the Client Name and click submit button .
=> The PHP code checks the contents of Client Name field returned by the Browser. As it has double spacing,an error message is generated and stored in the variable $alertmessage.
ereg("([[:space:]]{2})",$_POST["txtName"]);
------------------------------------------------------------------------------
else
{
if(ereg("([[:space:]]{2})",$_POST["txtName"]))
{
/*
returning data entry form if the Client's name contains double spaces.
*/
$alertmessage="<center>
Double spaces found in Client\'s Name!
</center>";
inclide("page2.php");
exit;
}
--------------------------------------------------------------------------------------------------------
basic code
Basic Code
1. How to create one form<html>
<head>
// you have put hear any meta tag or css depended on you.
</head>
<body>
<form action="process.html" method="post">
Name : <input type="text" name="nm"/><br/>
Add : <input type="text" name="add"/><br/>
Mo No : <input type="text" name="no"/><br/>
Other : <input type="text" name="otr"/><br/>
</form>
</body>
</html>
2. How to use switch case
switch (num)
{
case 1: alert("One");
break;
case 2: alert("Two");
break;
case 3: alert("Three");
break;
case 4: alert("Four");
break;
case 5: alert("Five");
break;
default: alert("Select 1 to 5 Number");
}3. How to create array using script
var demo = new array();
demo[0] = new array();
demo[0][0]='A0';
demo[0][1]='B0';
demo[0][2]='C0';
demo[1] = new array();
demo[1][0]='A1';
demo[1][1]='B1';
demo[1][2]='C1';
demo[2] = new array();
demo[2][0]='A2';
demo[2][1]='B2';
demo[2][2]='C2';
document.write("A : "+demo[0][0]+"<br/>");
document.write("B : "+demo[0][1]+"<br/>");
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