html {
overflow:scroll;
}
body {
text-align:center;
}
div#layout {
text-align:left;
margin:0 auto;
margin-top:0px;
width:100%;
max-width:980px;
min-width:770px;
}
div#main {
clear:both;
}
div#top {
clear:both;
}
div#bottom {
clear:both;
}
div#sidebar {
width:25%;
float:left;
}
div#content {
margin-left:25%;
}
.clearfix:after {
content:'.'; 
display:block;
height:0px;
clear:both; 
visibility:hidden;
}
.heightfix:before {
content:'.';
display:block;
visibility:hidden;
height:0;
}