if (document.images) {
  home_f2 = new Image(140 ,20); home_f2.src = "images/nav/home_f2.gif";
  home_f1 = new Image(140 ,20); home_f1.src = "images/nav/home.gif";
  about_f2 = new Image(140 ,20); about_f2.src = "images/nav/about_f2.gif";
  about_f1 = new Image(140 ,20); about_f1.src = "images/nav/about.gif";
  allergies_f2 = new Image(140 ,20); allergies_f2.src = "images/nav/allergies_f2.gif";
  allergies_f1 = new Image(140 ,20); allergies_f1.src = "images/nav/allergies.gif";
  asthma_f2 = new Image(140 ,20); asthma_f2.src = "images/nav/asthma_f2.gif";
  asthma_f1 = new Image(140 ,20); asthma_f1.src = "images/nav/asthma.gif";
  physicians_f2 = new Image(140 ,20); physicians_f2.src = "images/nav/physicians_f2.gif";
  physicians_f1 = new Image(140 ,20); physicians_f1.src = "images/nav/physicians.gif";
  reference_f2 = new Image(140 ,20); reference_f2.src = "images/nav/reference_f2.gif";
  reference_f1 = new Image(140 ,20); reference_f1.src = "images/nav/reference.gif";
  pollen_f2 = new Image(140 ,20); pollen_f2.src = "images/nav/pollen_f2.gif";
  pollen_f1 = new Image(140 ,20); pollen_f1.src = "images/nav/pollen.gif";
  appointments_f2 = new Image(140 ,20); appointments_f2.src = "images/nav/appointments_f2.gif";
  appointments_f1 = new Image(140 ,20); appointments_f1.src = "images/nav/appointments.gif";
  policies_f2 = new Image(140 ,20); policies_f2.src = "images/nav/policies_f2.gif";
  policies_f1 = new Image(140 ,20); policies_f1.src = "images/nav/policies.gif";
  contact_f2 = new Image(140 ,20); contact_f2.src = "images/nav/contact_f2.gif";
  contact_f1 = new Image(140 ,20); contact_f1.src = "images/nav/contact.gif";
  }

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}
function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}