img1 = new Image();
img1.src = "../images/rails2.png";
img2 = new Image();
img2.src = "../images/graphics2.png";
img3 = new Image();
img3.src = "../images/baking2.png";
img4 = new Image();
img4.src = "../images/poland2.png";
img5 = new Image();
img5.src = "../images/resume2.png";
img6 = new Image();
img6.src = "../images/about2.png";
img7 = new Image();
img7.src = "../images/site-design2.png";
img8 = new Image();
img8.src = "../images/about-site2.png";
img9 = new Image();
img9.src = "../images/envelope2.png";
img10 = new Image();
img10.src = "../images/twitter-feed2.png";
img11 = new Image();
img11.src = "../images/collected-feed2.png";

function roll_over(img_id, img_src){
   document.images[img_id].src = img_src;
}