IDs and CLASSs in CSS...

IDs and CLASSs in CSS:

Apart from styles for a HTML tag CSS aslo allows us to specify our own selectors called "id" and "class".

ID SELECTOR:

The id selector is used to specify a style for a single and unique element. The id selector uses id attribute of HTML-element and it's defined with a #.

#ID1
{
text-align:right;
color:blue;
}

CLASS SELECTOR:

Class selector is used to specify a style for a group of HTML elements. Class selector is most often used on several HTML elements. This allows you to set a particular style for any HTML elements with the same class.

The class selector uses the HTML class attribute, and is defined with a "."

A.left
{
text-align:left;
}

According to the line above all A elements with class="left" will be left aligned.

NOTE: Ids/Calsses does not work in Mozilla/Firefox if their names start with a number.