1 setting up your website using html and javascript to develop websites

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Setting up Your Website

Using HTML and JavaScript to Develop Websites.

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What we will look at:

Optimizing your site for search enginesMiscellaneous HTML topics

»Using Image maps »Linking within a webpage

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Competency Objectives

1. Understand how search engines work

2. Understand how to set up image maps

3. Learn how to link within a page

Competency Alert:You need to

know this!

Common Problem Area!

People seem to forget this

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Search Engines Search engine – A site that allows you to search the web for

stuff Typically has web a back-end database with indexed key

words » Has a special program (called a robot, crawler or spider) that

– follows links and find popular sites– Creates indices or search terms for site and puts into DB

Google was built at Stanford University » Originally had 3-4 parallel ‘spiders’ indexing about 100 pages / second.

How google Is different » Google pushes the most popular site to the top» A popularity indicator: The number of popular sites that link back to your site

yahoo.com and msn.com are next most popular sites.

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Some things to check

Has your site been indexed by google? » Try search term: site:yourdomain.com

9 pages have been indexed from webwizard.awl.com

7,790 pages have been indexed from www.depaul.edu

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What do they index? Move search engines fine tune/overhaul their

algorithms periodically. Each search engine has its own index method:

» Altavista might index all content of your site » Others might derive keywords from your content

– Based on <title>, <img alt=xxx>, <H1> tag content.

» Other sites might use Meta Tags– Engines that appear to use Meta tags:

AltaVista, Direct Hit, Excite, HotBot

– Sites that do not appear to use Meta Tags: Google?, lycos. Yahoo?

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Using Meta tags . . . A meta tag is:

» An optional HTML tags used to describe your site» <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">» <META NAME="TITLE" CONTENT="Hands-on Web Development Training Courses">

» <META NAME="DESCRIPTION" CONTENT="Hands-on Training Courses Perl, PHP and MySql,and Website development">

» <META NAME="KEYWORDS" CONTENT="Web Site Design, Perl Training, Learning Perl, PHP course, IT course, Perl course, PHP course, hands-on IT training">

Perhaps most important meta tag. Include a key specific search string.

May be used when a search engine shows search results. Put most important keywords first and keep less than 40 characters.

Put some keywords to try to ‘help’ the search engines. Still they may derive the keywords based on site’s content.

Competency Alert:You need to

know this!

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How else can you ‘help’ the search engines?

1. Make sure your search terms are in the content of you home page.

For example, may want ‘hands-on training’ inside the content

2. Reciprocal linking – You may want to: Establish a page that invites people to exchange links

with your site. Search sites in a similar fields that you request a

reciprocal link (that is, you link to them and they link to you.)

Google judges a sites popularity by number of sites that link to it. Therefore many sites reciprocal linking programs.

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Reciprocal Linking Some sites will keep a ‘sponsors’ or ‘references’

page» Basically seek to exchange links

Seek to exchange links

Sites they’ve probably already exchanged with

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What Help Is there ?

There are many companies in the search engine optimization business» One site is http://www.evrsoft.com/

http://www.evrsoft.com has free tools for meta tag generation, ranking tool, traffic comparisonautomatic search engine submit tool, and search term checking tool.

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Building Image Maps You can divide up any image into regions and

have each different region link to different places. Imagemaps - a webpage image that has more

than 1 link on it. Depending upon where you click you link to different places.

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An image map divides the image up

Top show image with 2 of the separate pieces

Here a couple images are placed together to look like 1 image.

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Manually creating an image map.

<body vlink="white"> <A Href=webdeisgn_syllabus.html> <img SRC="part1.JPG" height=221 width=176 border="0" ALT="GoTo Syllabus"></A>

<A Href=website_index.html><img SRC=part2.JPG height=221 width=116 border="0" ALT="Goto Index"></A>

<A final_project.html><img SRC="part3.JPG" height=219 width=143 border="0" ALT="Goto Final Project"></A>

<A HREF="website_index.html"><img SRC="part4.JPG" height=218 width=258 border="0" Alt="Goto Index"></A> </body>

You could use a photo editing tool » Cut image into pieces and display next to

eachother.

Note: specifying the height and width of image, does help browser to reserve space for image while downloading.

Show this image as a hot link, when clicked go here

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Disadvantages of manual method . . .

Couple of disadvantages with manual image map:

1. Need to use a paint program to manipulate image

2. Need to make sure they display properly.

3. Restricted to the types of images you can cut out (like rectangles or squares.)

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Image maps . . . You can use image maps to specify clickable

regions of a regular image. Can specify

» Rectangles – need to know pixel coordinates of upper left corner and lower right corner of each rectangle

» Circles » Polygons.

Lower left corner of each area

Upper right corner of each area

The lines here are for illustration purposes only.

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How to find pixel coordinates?

1. Can use a image editing program . . .

- mspaint, paint-shop pro or Gimp work fine

As put cursor here, the pixel location show here in mspaint

Note: mspaint can be started in XP by going to start->run and entering mspaint

Could move cursor over image to determine pixel location

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Record the pixel location

Record each upper left and lower right pixel location» Rectangle 1 "0, 0, 137, 82" » Rectangle 2 “171, 62, 242, 84" » Rectangle 3 "263, 59, 348, 86" » Rectangle 4 “359, 53, 453, 107"» Rectangle 5 “458, 49, 566, 108"

Upper left coordinate Lower right coordinate

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Defining the image map . . .

<html> <head> <title>A Manual Image Map</title></head><body vlink="white" alink="white" vlink="white" >

<img src ="Labselect.jpg" usemap="#navigate" border=0>

<map id =“navigate“> <AREA SHAPE="rect" COORDS="0, 0, 137, 82" alt="lab1“ href="Lab1.html"> <AREA SHAPE="rect" COORDS="171, 62, 242, 84" href="Lab2.html"> <AREA SHAPE="rect" COORDS="263, 59, 348, 86" href="Lab3.html"> <AREA SHAPE="rect" COORDS="359, 53, 453, 107" href="Lab4.html"> <AREA SHAPE="rect" COORDS="458, 49, 566, 108" href="Lab5.html">

</MAP>

Define the name of image map to use

Define image map called navigate. (name is old style tag reqd by some browsers).

Use the area tag to specify the shape, coordinates, and link for each clickable area

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Creating circles and polygons

Two other shapes you can create: » circle – specify the center-x, center-y and the

circle radius (in pixels).

<area href=“stuff.html" shape="circle" coords="95,75,65"> » polygon – specify the x and y coordinate of

each point in polygon<area href=“stuff2.html” shape="poly"

coords="300,70,300,200,165,250" >

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Creating Image Maps

Within XP, can use mspaint to create » Start by start->run and enter mspaint» Set image size by image -> attributes

Set attributes from image option

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Creating boxes on image

Can fill image with fill tool and select a color at bottom

Boxes can be drawn using box tool

To duplicate box, goto edit->select all, select box, and copy and paste the box. Drag it where you want

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Putting Text on ImageUse the font tool to add text

Change the size and style of text

When saving image, make sure it’s a gif or jpg

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Getting the coordinates

Record the coordinates of each box you want clickable

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Linking within a page

We learned that we can link to a page with »<a href=http://www.mypage.com> mypage </a>»This opens the browser to the TOP of the page at www.mypage.com

Sometimes want to open to a specific location in page. When click here, link opens up in center of page Note scroll bars

about ½ down page

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Creating links within a page

To create a link within a page1. Find the spot inside the page you want to link to: 2. Define a name for that place:

–<A NAME="Bird"></A>

3. Now you can create a link to that spot with: <A HREF="#Bird">Click Here</A> to goto Bird Section. </A>

OR <A HREF=“mysite.com#Bird">Click Here</A>

to goto Bird Section. </A>If location within another page.

Defines a label or bookmark for that location

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For example, Suppose have 2 pages, page1.html and

page2.html. When click link on page1.html takes you to

sesame street section of page2.html

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How it will works . . . Suppose the body of page2.html contained

Then page1.html can link with

 <a NAME="Sesame"> </a>Sesame Street Characters These three characters are Bert , Ernie and the infamous Cookie Monster. 

<HTML><HEAD><TITLE>Notes 4</TITLE></HEAD><BODY><HR width="100%"><A href="page2.html#Sesame">Click here </A>to goto Seaseme Street </a></body> </html>

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Summary. . .



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Module 1 Hands on Assignment

plain_map_image.gif

plain_image.gif

You can use either of these files

imagemap_paint.gif

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One Possible Solution

<html> <head> <title>A Manual Image Map</title></head><body vlink="white" alink="white" vlink="white" > <img src ="imagemap_paint.gif" usemap="#navigate" border=0><map id =“navigate" name="navigate"> <AREA SHAPE="rect" COORDS="0,0, 99,72" alt="Home" href=""> <AREA SHAPE="rect" COORDS="0,73,99, 146" href="calvin1.gif"> <AREA SHAPE="rect" COORDS="0, 147, 99, 219" href="dilbert.gif"> <AREA SHAPE="rect" COORDS="0,220, 99, 288" href="ernie.gif"> </MAP> </BODY> </HTML>

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Another lab exercise . . .

Create a set of meta tags for a web site for ‘Happy Harry’s Hardware store» He expects to sell hammers, screwdrivers and

drills online

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One possible solution

<html><head> <title> Happy Harrys Hardware Store </title><meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">

<META NAME="TITLE" CONTENT=“Hardware tool sale">

<META NAME="DESCRIPTION" CONTENT=“Hammer sale, screwdriver sale, drill sale">

<META NAME="KEYWORDS" CONTENT=“hammers, drills, hardware, screwdrivers">

<body>

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