var image1 = new Image();
image1.src = "hmbig_01.jpg";
var image2 = new Image();
image2.src = "hmbig_02.jpg";
var image3 = new Image();
image3.src = "hmbig_03.jpg";
var image4 = new Image();
image4.src = "hmbig_04.jpg";
var image5 = new Image();
image5.src = "hmbig_05.jpg";
var image6 = new Image();
image6.src = "hmbig_06.jpg";
var image7 = new Image();
image7.src = "hmbig_07.jpg";
var image8 = new Image();
image8.src = "hmbig_08.jpg";
var image9 = new Image();
image9.src = "hmbig_09.jpg";
var image10 = new Image();
image10.src = "hmbig_10.jpg";
var image11 = new Image();
image11.src = "hmbig_11.jpg";
var image12 = new Image();
image12.src = "hmbig_12.jpg";
var image13 = new Image();
image13.src = "hmsmall_03.jpg";
var image14 = new Image();
image14.src = "hmsmall_04.jpg";
var image15 = new Image();
image15.src = "hmsmall_05.jpg";
var image16 = new Image();
image16.src = "hmsmall_06.jpg";
var image17 = new Image();
image17.src = "hmsmall_07.jpg";
var image18 = new Image();
image18.src = "hmsmall_11.jpg";

function roll_one(img_name, img_src)
{
   document[img_name].src = img_src;
}
function roll_two(img_name1, img_src1, img_name2, img_src2)
{
   document[img_name1].src = img_src1;
   document[img_name2].src = img_src2;
}