var browser_name = navigator.appName;
var browser_version = parseFloat(navigator.appVersion); 

if ((browser_name == "Netscape" && browser_version >= 3.0)||(browser_name == "Microsoft Internet Explorer" && browser_version >= 4.0)) { roll = 'true'; }
else { roll = 'false'; }

if (roll=='true') { 
img_loc = new Array()
img_loc[0] = "img/hairmakeup_off.gif"
img_loc[1] = "img/hairmakeup_on.gif"
img_loc[2] = "img/workshop_off.gif"
img_loc[3] = "img/workshop_on.gif"
img_loc[4] = "img/face_off.gif"
img_loc[5] = "img/face_on.gif"

// aanpassen voor highlight
img_name = new Array();
img_name[0] = "hair";
img_name[1] = "workshop";
img_name[2] = "face";

img = new Array();

for (var i = 0; i < img_loc.length; i++){
       img[i] = new Image()
       img[i].src = img_loc[i]
       }
}       

function swap(imgname,imgnum) {   
  if (roll =='true' && picked_name != imgname) {
    	document.images[imgname].src= img[imgnum].src;
  }
}