Code I

#sidebar {
	float: left;
	width: 300px;
	}
#content {
	width: 400px;
	margin-left: 310px;
	}
/* hide from MacIE \*/
* html #sidebar {
	margin-right: 7px;
	}
* html #content {
	margin-left: 0;
	}
/* end hide */

Code II

#sidebar {
	float: left;
	width: 300px;
	}
#content {
	margin-left: 300px;
	}
/* hide from MacIE \*/
 * html #sidebar {
margin-right: -3px;
}
* html #content {
height: 1%;
margin-left: 0;
}
/* end hide */