body {
			background-color:#ffffff;
		}
		#content {
			position:absolute;
			left:50%;
			top:50%;
			width:300px;
			height:300px;
			/* the width/2 */
			margin-left:-250px; 
			/* the height/2 */
			margin-top:-80px;
			text-align:left;
			font:11px verdana;
			padding:10px;
		}
		body>#content {
			margin-left:-250px; /* Correct value. */
			margin-top:-80px; /* Correct value. */
		}