let's take a look at the relevant definition of the position attribute in CSS3 Api:
code is as follows:


initial/* * * * * * * * * * * * * * * * * */
<Style type="text/CSS" >
# first {width: 200 px; Height: 100 px; Border: 1 px solid red; }
# second {width: 200 px; Height: 100 px; Border: 1 px solid blue; }
</style>
<Body>
<Div id="first" >First