Most of the positioning problems with the drop down menus can be solved by making sure the HTML for the drop down DIVs themselves is outside any container tag on the page other than the BODY. So in your case, try moving all the drop down DIVs to the bottom of your page, just above the "</body>" tag:
Code:
<!--1st drop down menu -->
<div id="dropmenu1" class="dropmenudiv">
<a href="#"><img class="imgd" src="1/images/upload.gif" alt="" border="0"/>مركز الرفع</a>
<a href="#"><img class="imgd" src="1/images/glitter.gif" alt="" border="0"/>صانع الجلتر</a>
<a href="#"><img class="imgd" src="1/images/za5aref.gif" alt="" border="0"/>زخرف أسمك</a>
<a href="#"><img class="imgd" src="1/images/scan.png" alt="" border="0"/>أفحص جهازك</a>
<a href="#"><img class="imgd" src="1/images/ip.gif" alt="" border="0"/>أعرف الـ ip خاصك</a>
<a href="#"><img class="imgd" src="1/images/satellite.gif" alt="" border="0"/>تردد القنوات</a>
<a href="#"><img class="imgd" src="1/images/color.gif" alt="" border="0"/>أكواد الألوان</a>
<a href="#"><img class="imgd" src="1/images/msn.gif" alt="" border="0"/>موسوعة الماسنجر</a>
<a href="#" target="_blank"><img class="imgd" src="1/images/keyboard.png" alt="" border="0"/>الكيبورد العربي</a>
<a href="#"><img class="imgd" src="1/images/tell.gif" alt="" border="0"/>أخبر عنا</a>
</div>
<script type="text/javascript">cssdropdown.startchrome("chromemenu")</script>
</body>
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