if (document.images) {
featuresoff=new Image();
featuresoff.src= "images/menus/featuresoff.gif";
featureson=new Image();
featureson.src= "images/menus/featureson.gif";
screenshotsoff=new Image();
screenshotsoff.src= "images/menus/screenshotsoff.gif";
screenshotson=new Image();
screenshotson.src= "images/menus/screenshotson.gif";
downloadoff=new Image();
downloadoff.src= "images/menus/downloadoff.gif";
downloadon=new Image();
downloadon.src= "images/menus/downloadon.gif";
purchaseoff=new Image();
purchaseoff.src= "images/menus/purchaseoff.gif";
purchaseon=new Image();
purchaseon.src= "images/menus/purchaseon.gif";
supportoff=new Image();
supportoff.src= "images/menus/supportoff.gif";
supporton=new Image();
supporton.src= "images/menus/supporton.gif";

homeoff=new Image();
homeoff.src= "images/header/homeoff.gif";
homeon=new Image();
homeon.src= "images/header/homeon.gif";
contactoff=new Image();
contactoff.src= "images/header/contactoff.gif";
contacton=new Image();
contacton.src= "images/header/contacton.gif";
blogoff=new Image();
blogoff.src= "images/header/blogoff.gif";
blogon=new Image();
blogon.src= "images/header/blogon.gif";


}

function imageOn (imagename){
  document[imagename].src=eval(imagename+"on.src");
 }
function imageOff (imagename){
  document[imagename].src=eval(imagename+"off.src");
 }