1. Style : style="coloer:red;"

2. ID : #type { color: red }

3. class : .contents { color:red }

4. 조건 : P B { color : red }

5. 타입 : B { color : red }

1. Inline style sheet
    ex) style=""


2. Embedded style sheet
    ex) <STYLE type="text/css">
        <!--
        -->
        </STYLE>


3. Linked style sheet
    ex)  <LINK rel="stylesheet" type="text/css" href="mysite.css">


4. Imported style sheet
    ex)<STYLE type="text/css">
        <!--
        @import url("mysite.css");      
        -->
        </STYLE>