display block

I have created CSS style sheet.Here i m giving code.I want display block.when i click on link at run time it shows doted block.
In IE it runs fine but in firefox it shows that doted block.so plz help me.

#Querybar 
{
margin-top:10px;
padding-bottom:10px;
text-decoration:none;
background-color:#5b5b5b;
}
  
#QuerybarArea a 
{
	width:400px;
	display:block;
	clear:both;
	padding-right:15px;
	padding-top:6px;
	height:25px;
	color:#FFFFFF;
	text-decoration:none;
	font-size:14px;
	font-weight:bold;
	background-color:#5b5b5b;
	margin-top:3px;
	text-align:left;
  }  
  
#QuerybarArea a:hover, #QuerybarArea a.active 
 {
	background-color:#5b5b5b;
	text-decoration:none;
	color:#5CB3FF;
}