[tempz]

Try this:

<div id="container" style="width: 960px;margin: 0 auto;">
<div id="bk_image"></div><div id="mainC">
	
	<div style="margin:10px 0 0 100px ; "> 
	<span style="font:Helvetica,Arial,sans-serif; font-size:20px; color:#000000;">Auto World</span>
	<span style="font:Helvetica,Arial,sans-serif; font-size:16px; color:#000000;">The Maddest Auto Community</span>
	<br><br>
	</div>
	<img alt="Auto World" title="Auto World" src="/images/trees.jpg">
	<div style="margin: 0 auto;">
	<div id="banner" style="height: 150px; width: 900px; display: block;">
	<div id="imgContainer" style="width: 1800px; left: 0px;"><img id="img_1" src="http://expert-world.org/banners/top-ten-fitness-diets.jpg"><img id="img_2" src="http://expert-world.org/banners/family-fitness-activities.jpg"></div>
	</div> // end banner div
	</div>  // end center div
	<br><br>
</div>

</div>