div#content{float:right;width:730px}
div#navigation{float:left;width:230px}
div#extra{float:left;clear:left;width:230px}
div#footer{clear:both;width:100%}

	
div#content{float:none;margin:0px;width:100%}
div#navigation,div#extra{float:none;clear:none}

div#navigation{display:none; left;width:230px}
div#extra{display:none;float:right;width:730px}
div#footer{clear:both;width:100%}