<style type="text/css">
.back {
background-image: url(back.jpg);
background-repeat:no-repeat;
background-position:center center;
-o-background-size: 100% 100%, auto;
-moz-background-size: 100% 100%, auto;
-webkit-background-size: 100% 100%, auto;
background-size: 100% 100%, auto;
}
.div1 {width:200px; height:150px; padding:10px; margin-left:10px;}
.div2 {width:300px; padding:10px; margin-left:10px;}
.div3 {float:left; padding:10px; margin-left:10px;}
.back h4 {padding:5px 0; margin:0;}
.back p {padding:5px 0; margin:0;}
</style>

		  <h3>A Box with known width and height</h3>
		  <div class ="back div1">
		  <h4>A Box with known width and height</h4>
		  <p>Caramels caramel tiramisu. Jolly jelly cake fairies. Biscuit roll tiramisu brownie topping. Tart bear claw muffin.</p>
		  </div>
		  <br>
		  <h3>A Box with known width and unknown height</h3>
		  <div class ="back div2">
		  <h4>A Box with known width and unknown height</h4>
		  <p>Sugar plum sesame snaps cotton candy chupa chups jelly lemon
drops. Gingerbread tiramisu gummies. Sugar plum biscuit chocolate danish
icing wypas. Marshmallow dessert lemon drops jelly. Bonbon chocolate
sugar candy brownie.</p>
		  <p> Liquorice tiramisu tootsie roll apple pie pudding bear claw.
Halvah chocolate wafer halvah croissant candy candy canes. Candy canes
icing chocolate cake muffin brownie.
		  </p></div>
		  <br>
		  <h3>A Box with unknown width and unknown height</h3>
		  <div class ="back div3">
		  <h4>A Box with unknown width and unknown height</h4>
		  <p>Sugar plum sesame snaps cotton candy chupa chups jelly lemon drops.<br>Gingerbread tiramisu gummies. 
Sugar plum biscuit chocolate danish icing.<br>Marshmallow dessert lemon drops jelly work.<br>
Bonbon chocolate candy candy brownie.<br>Liquorice tiramisu tootsie roll apple pie pudding bear claw.<br>
Chocolate wafer croissant candy candy canes.<br>Candy canes icing chocolate cake muffin brownie.</p>
		  </div>
		  <br class ="clear">
		  <br><br>