.pf_4_bg{
	width:39px;
	height:39px;
	background-image: url('../images/pf_4.png');
	background-image:
		expression( 
              (navigator.appVersion.indexOf("MSIE 6")>-1 || navigator.appVersion.indexOf("MSIE 5.5")>-1) ? "url()" : (navigator.appVersion.indexOf("MSIE 5.0")>-1) ? "url('/site/images/pf_4_png.gif')" : "" 
         ); 
    filter: 
         expression( 
               (navigator.appVersion.indexOf("MSIE 7")>-1) ? "none" : "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='/site/images/pf_4.png', sizingMethod='scale')" 
         ); 
	background-position:top left;
	background-repeat:no-repeat;
}