有谁熟悉这段代码？

<script type="text/javascript">
var focus_width=280
var focus_height=210
var text_height=35
var swf_height = focus_height+text_height
var pics='<%=picstr%>'
var links='<%=links%>'
var texts='<%=texts%>'   
 document.write('<object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" codebase="http://fpdownload.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,0,0" width="'+ focus_width +'" height="'+ swf_height +'">');
 document.write('<param name="allowScriptAccess" value="sameDomain"><param name="movie" value="/ads/focus1.swf"><param name="quality" value="high"><param name="bgcolor" value="#F0F0F0">');
 document.write('<param name="menu" value="false"><param name=wmode value="opaque">');
 document.write('<param name="FlashVars" value="pics='+pics+'&links='+links+'&texts='+texts+'&borderwidth='+focus_width+'&borderheight='+focus_height+'&textheight='+text_height+'">');
 document.write('</object>');
 </script>其中object 中的classid代表什么？