Extending a style class

[gokulrenga]

Is it possible to extend a style class?
for example i have to classes
.common {
color:red;
}
.commonFont {
font-family:Arial;
font-size:8pt;
}
I need the class commonFont also to have the properties of the class common.
How can this be done?

[drhowarddrfine]

Yes and no. It's possible for an element to inherit styles from parent elements. For example, if you have a <h1 class="mystyles "> and <h2> inside a <div>, you can apply all the styles of <div> to the <h1> with:
div h1{
your styles
}
or better yet:
div .mystyles{

Another way is with "selectors" .