If you are on-line, you can try these links. The URL of a web page is the web address - what appears in Netscape's Location line (URL stands for Uniform Resource Locator). Web pages out there on the Web have URLs starting with http:// while pages on your own machine usually start with file:/// Look carefully at the full URL that appears in the Location, and notice how, in Netscape, the URL of where a link will take you appears at the bottom of the window if you hold the mouse over the link. Use the Back button of the browser after trying them.
Quite often you find lists of links that someone has gathered together as a useful resource. Well, sometimes they are useful. Below are a few links which may be useful for learning more about HTML.
When you View the Page Source, notice two things. Firstly the overall pattern: each link has an 'a' tag, some words to click on, and a '/a' tag to finish. Secondly, the internal structure of the 'a' tag: 'a' space 'href=' then the full URL of the page you want to go to, enclosed in double quotes. The easiest way of avoiding mistakes when copying URLs and making links on your web page is first to get the page you want to link to up on your browser, then to copy and paste the URL from the Location into your editor where you are constructing your web page.
from W3
my guide
SIGCHI site for "computer-human interaction"
What happens when you get a URL wrong? It depends where the mistake is. If you get the http:// wrong, your browser won't even try to connect to the Internet, and will just complain. If you get the host wrong, that is the bit between the double slash (//) and the first single slash (/), you will probably get a message from your provider's machine telling you that the host cannot be found. On the other hand, if you get the host right but the path (between single slashes) or filename (after the last slash) wrong, you should get a message back from that host telling you that the page was not found. This is called a "404" - the http code for not found.