image map in firefox/mozilla

#headerimg  {
  padding: 5px 0;
  width: 100%;
  height: 124px; /* If you change header pictures make sure to change this value to the correct height*/
  width: 736px;
  display:block;
  background: url('images/evu_masthead.jpg') no-repeat bottom center;
}

/*\*/
* html .header {background-position: 10px 3px;}
/* IEwin hack needed because the "evu_masthead" BG is in a positioned wrapper and shows
variance. IEwin does not support fixed backgrounds on elements other than the body */


/* place the <dd>s in the correct absolute position */
#headerimg dd {
  position:absolute;
  padding:0;
  margin:0;
  } 
  
#headerimg #applybutton {
  left:182px;
  top:73px;
  z-index:20;
  }
  
/* style the <dd><a> links physical size and the background image for the hover */
#headerimg a#applicationlink{
  display:block;
  width:16%;/*125px;*/
  height:45px;
  background:transparent -100px -100px no-repeat;/* url('images/evu_masthead.jpg')*/
  z-index:5;
  }
/* which part of the dl maps to which part of the style sheet*/ 

   
<dl id="headerimg">
	<dd id="applybutton">
		<a id="applicationlink" title="Start your American dream today!" href="http://www.easyvisausa.com/form1.php?lang=en">
		</a>
	</dd>
</dl>