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 loadImage(fileName)
{ newImage = new Image();
  newImage.src = fileName;
  return newImage;
}

if (document.images)
{
   main_bullet_low = loadImage(img_folder + "main_bullet.gif");
   main_bullet_hi = loadImage(img_folder + "main_bullet_h.gif");

   sub_bullet_low = loadImage(img_folder + "sub_bullet.gif");
   sub_bullet_hi = loadImage(img_folder + "sub_bullet_h.gif");
}


function Roll(id,fn,level)
{
   if (document.images)

	  if (id == "over")
      {  document[fn].src = eval(level + "_bullet_hi.src");
      }
      else if (id == "out")
      {  document[fn].src = eval(level + "_bullet_low.src"); 
      }
}


function openWin(url)
{
   newwindow=window.open(url,"MMWR",                  
"scrollbars=yes,resizable=yes,status=yes,width=800,height=400,screenX=0,screenY=0,left=0,top=0,toolbar=yes,menubar=yes,location=yes");
                            
} 


function sendIt()
{
  newwindow=window.open(deRef + 'sendit_form.html','SendIt',                  
'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(deRef + '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');
                            
} 



function FrontPage_Form1_Validator(theForm)
{

  if (theForm.Name.value == "")
  {
    alert("Please enter a value for the \"Name\" field.");
    theForm.Name.focus();
    return (false);
  }

  if (theForm.From.value == "")
  {
    alert("Please enter a value for the \"From\" field.");
    theForm.From.focus();
    return (false);
  }
  return (true);
}