Achievement effect: Code: < head> <br> *<br> {<br> margin:0 ;<br> , margin:0px auto;<br> <br> #container #header container #pagebody #sidebar<br> %;<br> height:500px;<br> float:left; container #pagebody #mainbody<br> <br> float:left;<br> height:500px;<br> background-color:Black; footer<br> color:Gray;<br> id="header"><br> 🎜> div id="footer"></div><br> </div><br> </body><br> </html><br> <br> <br></p>
