var image1 = new Image();
image1.src = "http://www.pthvn.nl/img/pthvn-item1.png";
var image2 = new Image();
image2.src = "img/pthvn-item1mouseover.png";
var image3 = new Image();
image3.src = "http://www.pthvn.nl/img/pthvn-item2.png";
var image4 = new Image();
image4.src = "http://www.pthvn.nl/img/pthvn-item2mouseover.png";
var image5 = new Image();
image5.src = "http://www.pthvn.nl/pthvn-item3.png";
var image6 = new Image();
image6.src = "http://www.pthvn.nl/pthvn-item3mouseover.png";
var image7 = new Image();
image7.src = "http://www.pthvn.nl/img/pthvn-item4.png";
var image8 = new Image();
image8.src = "http://www.pthvn.nl/img/pthvn-item4mouseover.png";
var image9 = new Image();
image9.src = "http://www.pthvn.nl/img/pthvn-indexpic.png";
var image10 = new Image();
image10.src = "http://www.pthvn.nl/img/pthvn-indexpicmouseover.png";
var image11 = new Image();
image11.src = "http://www.pthvn.nl/img/pthvn-contactpic.png";
var image12 = new Image();
image12.src = "http://www.pthvn.nl/img/pthvn-contactpicmouseover.png";
var nav1 = new Image();
nav1.src = "http://www.pthvn.nl/img/navbalk/normal/navbalk_01.png";
var nav2 = new Image();
nav2.src = "http://www.pthvn.nl/img/navbalk/hoover/navbalk_01.png";
var nav3 = new Image();
nav3.src = "http://www.pthvn.nl/img/navbalk/normal/navbalk_03.png";
var nav4 = new Image();
nav4.src = "http://www.pthvn.nl/img/navbalk/hoover/navbalk_03.png";
var nav5 = new Image();
nav5.src = "http://www.pthvn.nl/img/navbalk/normal/navbalk_05.png";
var nav6 = new Image();
nav6.src = "http://www.pthvn.nl/img/navbalk/hoover/navbalk_05.png";
var nav7 = new Image();
nav7.src = "http://www.pthvn.nl/img/navbalk/normal/navbalk_07.png";
var nav8 = new Image();
nav8.src = "http://www.pthvn.nl/img/navbalk/hoover/navbalk_07.png";
var nav9 = new Image();
nav9.src = "http://www.pthvn.nl/img/navbalk/normal/navbalk_09.png";
var nav10 = new Image();
nav10.src = "http://www.pthvn.nl/img/navbalk/hoover/navbalk_09.png";
var logo1 = new Image();
logo1.src = "http://www.pthvn.nl/img/pthvn-logo.png";
var logo2 = new Image();
logo2.src = "http://www.pthvn.nl/img/pthvn-logomouseover.png";
var social1 = new Image();
social1.src = "http://www.pthvn.nl/img/navbalk/normal/navbalk_11.png";
var social2 = new Image();
social2.src = "http://www.pthvn.nl/img/navbalk/hoover/navbalk_11.png";
var social3 = new Image();
social3.src = "http://www.pthvn.nl/img/navbalk/normal/navbalk_12.png";
var social4 = new Image();
social4.src = "http://www.pthvn.nl/img/navbalk/hoover/navbalk_12.png";
var previousbutton = new Image();
previousbutton.src = "http://www.pthvn.nl/img/pthvn-nieuws-older.png";
var previousbutton2 = new Image();
previousbutton2.src = "http://www.pthvn.nl/img/pthvn-nieuws-older-mouseover.png";
var nextbutton = new Image();
nextbutton.src = "http://www.pthvn.nl/img/pthvn-nieuws-newer.png";
var nextbutton2 = new Image();
nextbutton2.src = "http://www.pthvn.nl/img/pthvn-nieuws-newer-mouseover.png";
function roll_over(img_name, img_src)
   {
   document[img_name].src = img_src;
   }