#container { 
	width: 100%;  /* this will create a container 100% of the browser width, or span 100% of a table cell */
	margin: 0 auto; /* the auto margins (in conjunction with a width) center the page */
	text-align: left;
} 
#leftcolumn {
	float: left; 
	width: 280px; /* since this element is floated, a width must be given */
}
#leftcolumn p {
	margin-right: 10px;
}
#rightcolumn {
	margin-left: 280px;
}