/* set margins, padding, and inline-level content alignment */
body,div	{ margin: 0; padding: 0; text-align: center	}

/* set widths and float nav & ads div content boxes */
#nav		{ float: left;  width: 100px	}
#ads		{ float: right; width: 100px	}
/* note: if you change the widths above also change the margins in the rule below */

/* set side txt margins 5px greater than nav & ads widths */
#txt		{ margin-left: 105px; margin-right:105px	} 

/* ensure footer stays at the bottom */
#ftr		{ clear: both	}

/* show boundaries and set image sizes - for clarity only */
#hdr, #ftr	{
}
#nav, #ads	{
}
#txt		{
}

/* stretch image to represent content - for clarity only */
#hdr img	{ width: 250px; height:  25px	}
#ads img	{ width:  75px; height: 100px	}
#txt img	{ width: 150px; height: 200px	}#div-1,#div-2 {
	height: 50px;
	width: 150px;
}