[More terms] [Glossary Index] [Home]
- Q tag
<q> </q> can be used for inline quotations, as compared to <blockquote> </blockquote> which separates the quote from the text with line breaks. Example:
This is a q quote
(any " markers that appear are down to the way your browser handles q.) andthis is a blockquote.The Q tag may also be used as a peg from which you can hang your CSS rules:
Q {color:olive;}etc.. e.g.This is an olive quote
. Q takes one attribute, cite which can hold the URL of the document from which the quote was taken. Netscape4 does not support the q tag.
Top - Radio
Javascript
Radio inherits properties, methods and event handlers from Input and HTMLElement. Only additional or over-ridden features are mentioned here.
- PropertiesTo read the value to be submitted by a radio control:
var value = document.formname.groupname[index].value;
- Properties
- Relative
- In relation to links and URL's: A relative URL is completely dependent on where the current document is located on your system or your web server. Relative URL's are only useful within your own site and need to include details of how the server should move through your site, up and down the directory tree, the find the file. e.g. index.html or ../query/past.html are both relative URL's. These links will fail (i.e. broken) if the current document is moved. See also absolute. Note that to find a file in a higher directory or to go back a stage in the tree, use ../ to signify the directory immediately above the one containing the current file.
- In relation to CSS positioning: Relative positioning provides an offset from the current flow of the page and allows elements to be accessed by a Javascript function. A relative position of top:0 left:0 is no different to the default static position.
- Reset
Javascript
Reset inherits properties, methods and event handlers from Input and HTMLElement. Only additional or over-ridden features are mentioned here.
- PropertiesJavascript can manipulate the text that appears on a Reset button using:
document.formname.resetname.value = "new text"; - MethodsNo additional or over-ridden methods.
- Event HandlersTo extend the function of a clicked Reset button, use:
<input type="reset" name="ID" onclick="my_clickfunc();">
- Properties
- RGB values
The RGB value is a # and a set of three hexadecimal values. Some standard colours are recognised by most browsers - you can use the name instead of the RGB value to make code easier to read and debug. See colours.
Aqua #00FFFF Navy #000080 Black #000000 Olive #808000 Blue #0000FF Purple #800080 Fuchsia #FF00FF Red #FF0000 Gray #808080 Silver #C0C0C0 Green #008000 Teal #008080 Lime #00FF00 Yellow #FFFF00 Maroon #800000 White #FFFFFF - Robots
Robots (or spiders) are automated information retrieval programs collecting data for search engines. There is a standard way of communicating with these robots - intended to control their movements so that the site designer can prevent access to certain areas, for example, directories without html content. As an alternative to the usual "robots.txt" file, you can use <meta> tags to control the robots. To prevent further indexing of your pages, use the following tag in the page: (The tag is not well supported.)
<meta name="robots" content="noindex, nofollow">The robots.txt file consists of one or more records separated by one or more blank lines. Each record contains lines of the form "field":"optionalspace""value". The field name is case insensitive. Comments can be added using #. Example:
# robots.txt for http://www.codehelp.co.uk
Robot: * #any and all are to follow these rules.
Disallow: /notthisfolder/ #ignore this folder.
Disallow: /northisone/ #ignore this folder too.
The robots.txt file needs to be in the main index directory of your site. For more information on robots, email me or search for robots.txt in a search engine.
Top - Rollovers
Changing an image when a visitor points to an area.
Based on a section in HTML4 - Visual Quickstart Guide. This method uses three images and can be slow. Faster code is explained in the HTML4 book above. First create the link as normal, then use the onmouseover attribute.
onmouseover="document.imgname.src=´imageon.png´"
followed by the onmouseout attribute within the same link:
onmouseout="document.imgname.src=´imageoff.png´"
Then close the link and enter the image tag that will hold both images.
<img src="imagestart.png" name="imgname" width=w height=h alt="image" border=0></a>
All three images share the same width and height which should be entered in place of w and h respectively. Note that not all browsers support rollovers, so make sure that the first image, imagestart.png in the example, is identifiable and make sure the ALT tag has relevant content.
Top - Rows
rows attribute: <frameset> tag. Specifies the size of the horizontal frames. See also cols. <frameset rows="25%,100,*"> sets three rows, the first 25% of the available screen area, the second precisely 100 pixels high and the third taking whatever remains of the available screen area. Take care with precise values, you have no control over the screen area your visitor chooses to make available.
Top - Rules
- Horizontal rules: See HR.
- Within tables: An attribute of the <table> tag, rules determines where to draw lines between and around cells. The default is none. Other values are:
- groups: rules appear between row groups, <thead><tfoot><tbody>
- rows: between rows only
- cols: between columns only
- all: between all rows and columns.
- Stylesheets: The rules are the basis of the stylesheet. Each rule
consists of a selector and a declaration enclosed in {} brackets. The selector can be an HTML tag,
e.g.H1,
or a class selector .
or an id selector #
Example of each rule:
H1 {color:blue;background-color:transparent;}
.myclass {color:blue;background-color:transparent;}
#myID {color:blue;background-color:transparent;}
[http://www.codehelp.co.uk/query/glossaryR.shtml] is part of www.codehelp.co.uk
Copyright © 1998-2004 Neil Williams
See the file about.html for copying conditions.
