How to match border that it will be seen?

[toplisek]

I have defined script for navigation and have problem how to define correct css that it will be seen also top and bottom border of navigation? Need help

CSS:

#navigation1 { margin-bottom:12px;width:205px;text-align:center;float:left; }   

.topright{ background:  #fff url('topright.gif') no-repeat right top; }       
.topleft { background:  url('topleftgif') no-repeat left top; }       
.bottomright { background:  url('bottomright.gif') no-repeat right bottom; }  
.bottomleft { background:  url('bottomleft.gif') no-repeat left bottom; }

HTML CODE:

<div id="navigation1"  class="topright">
<div class="topleft">
<div class="bottomright">
<div class="bottomleft">
<div class="????"><img border="0" id="?????" src="content1.gif" /></div>
</div></div></div>
</div>

[toplisek]

As there is possibility just to upload 3 images, I enclose additional 2.
thank you