Reduce space btwn main content & ... CS4

Thank you in advance for your help.

Need to reduce the space between slide1.png image and indexheading>Aging with Dignity.

PLEASE SEE ATTACHED IMAGE (IN MS WORD) OF ISSUE.

<li><a href="#">Care &amp; Services</a> </li>
<li><a href="#">Accommodations</a></li>
<li><a href="#">Calendar</a></li>
</ul>

</div>

<img name="" src="images/slide1.png" width="900" height="150" alt="" />
<div id="mainContent">

<h4 class="indexheading">Aging with Dignity...</h4>
<p class="indexbody"> As our loved ones age, it can often become harder and harder for them to be as independent as they once were. Everyday tasks such as meal preparation or dressing themselves, compounded with illness, can become a struggle.<br />