Negative Werte für margin/padding

[maddy]

  
<div id="flash">  
<param name="quality" value="high" wmode="transparent" />  
<embed src="fileadmin/Promatis/template/Flash/karriereStartFlash.swf" quality="high" pluginspage="http://www.adobe.com/shockwave/download/download.cgi?P1_Prod_Version=ShockwaveFlash" type="application/x-shockwave-flash" width="938px" height="300px" wmode="transparent"></embed>  
</div>  

  
#flash{  
height:300px;  
background-color:green;  
}