Wednesday, May 11, 2011

lecture

<html>
<head>
<link rel="stylesheet" type="text/css"

href="first.css" />
</head>

<body>
<p>This is all about my friends!</p>
<hr/>
<p>They are nice.</p>
</body>
</html>

for the web site, use an external style sheet on at least one web page.

client side scripting vs. server-side scripting


web server sends info to the web browser (which is the client)

Javascript -- carried out on the client's machine

javascript is event-driven.
as opposed to procedural-based programming.

Javascript can write cookies.

drawbacks of cookies.
stays only on that machine.

third-party cookies.
both site A and site B get their ads from site Z. site Z is the third party.

third-party cookies can be used to track users.

Amazon obviously does NOT use simple cookies to keep track of your order.

they use server-side scripting. examples of lanugages that support it: PHP, vbscript meaning ASP, ASPX.

often, hooked up to a database.

next up, AJAX.

No comments:

Post a Comment