var agt=navigator.userAgent.toLowerCase();
var is_major = parseInt(navigator.appVersion);
var is_mac    = (agt.indexOf("mac")!=-1);
var is_ie   = (agt.indexOf("msie") != -1);
var is_ie3  = (is_ie && (is_major < 4));
var is_ie4  = (is_ie && (is_major == 4) && (agt.indexOf("msie 5.0")==-1) );
var is_ie5up  = (is_ie  && !is_ie3 && !is_ie4);

var is_nav  = ((agt.indexOf('mozilla')!=-1) && (agt.indexOf('spoofer')==-1) && (agt.indexOf('compatible') == -1) && (agt.indexOf('opera')==-1) && (agt.indexOf('webtv')==-1));
var is_nav5up = (is_nav && (is_major >= 5));


if (is_mac)
  if (is_ie5up || is_nav5up)
  	document.write('<link rel="stylesheet" type="text/css" href="' + deRef + 'scripts/winstyles.css">'); 
  else 
    document.write('<link rel="stylesheet" type="text/css" href="' + deRef + 'scripts/macstyles.css">');
else 
  document.write('<link rel="stylesheet" type="text/css" href="' + deRef + 'scripts/winstyles.css">');


function contact()
{
  newwindow=window.open(deRef + 'ContactCE.asp','Contact',                  
'scrollbars=yes,resizable=yes,status=no,width=550,height=400,screenX=0,screenY=0,left=0,top=0,toolbar=yes,menubar=yes,location=no');
                            
} 


function openHelp()
{
  newwindow=window.open('http://www.cdc.gov/mmwr/printhelp.html','PrintHelp',                  
'scrollbars=yes,resizable=yes,status=no,width=630,height=270,screenX=0,screenY=0,left=0,top=0,toolbar=yes,menubar=no,location=no');
                            
}