compat = false;
if( parseInt( navigator.appVersion ) >= 3 ) { compat = true; }
// cache images for quick swapping
if( compat ) {
     butn1off = new Image (100,150);
     butn1off.src = "images/portrait1.jpg";

     butn1on = new Image (100,150);
     butn1on.src = "images/trans.jpg";
     butn2on = new Image (100,150);
     butn2on.src = "images/websites.jpg";
     butn3on = new Image (100,150);
     butn3on.src = "images/teaching.jpg";
     butn4on = new Image (100,150);
     butn4on.src = "images/photos.jpg";


     }
// swap images using the cached images
function swapit(x, y)
{
   if( compat ) { document.images[x].src=eval(y+'.src'); }
}
//
function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

//
function PopUp(url,w,h) {
  doit = open("images/" + url + ".jpg","isabellejackson","resizable=no,top=20,left=20,width=" + w + ",height=" + h);
}
function clearWindow() {
  if (doit != null && doit.open) doit.close();
}

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;
}

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_displayStatusMsg(msgStr) { //v1.0
  status=msgStr;
  document.MM_returnValue = true;
}