styles - About Basic CSS classes and hierarchy - not to effect all page elements -


i have following sample doing want:

<style> div { position: relative; padding-top: 30px; display: block; } div h3 { position: absolute; top: 0px; left: 0px; display: block; } div h3 { width: 200px; height: 230px; display: block; } div img { width: 200px; height: 200px; display: block; } </style>  <div>  <h3><a href="/xxxx/abcd.htm">linker</a></h3>  <img src="/xxxx/abcd.jpg" alt="linker image" /> </div>

the obvious problem affects of items on page , not needed div. how put proper class formation without losing hierarchy , having not affecting of page's elements.

thanks

use classes , ids. used solve problem - distinguish elements. ids need unique in whole document while classes can occure multiple times. 1 element can have several classes (whitespace separated list) 1 id.

<div id="unique-id" class="class1 class2 class2">         <h3 class="child-h3"><a href="/xxxx/abcd.htm">linker</a></h3> </div>

and in css:

#unique-id{    ...styles }  #unique-id h3, #unique-id child-h3{ /* both selectors match same element*/     ...styles }  .class1{    ...styles }

you can find short tutorial here: http://www.tizag.com/csst/cssid.php

also, might want selectors: http://www.w3.org/tr/css2/selector.html


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