The id SelectorThe id selector is used to specify a style for a single, unique element.
The id selector uses the id attribute of the HTML element, and is defined
with a "#".
The style rule below will be applied to the element with id="para1":
Do NOT start an ID name with a number! It will not work in Mozilla/Firefox.
The class SelectorThe class selector is used to specify a style for a group of elements.
Unlike the id selector, the class selector is most often used on several
This allows you to set a particular style for many HTML elements with the
The class selector uses the HTML class attribute, and is defined with a "."
In the example below, all HTML elements with class="center" will be
You can also specify that only specific HTML elements should be affected by a class.
In the example below, all p elements with class="center" will be center-aligned:
Do NOT start a class name with a number! This is only supported in Internet Explorer.
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