var pix = new Array;
pix[0] = "images/design01/image_01.jpg";
pix[1] = "images/design01/image_02.jpg";
pix[2] = "images/design01/image_03.jpg";
pix[3] = "images/design01/image_04.jpg";
var rand = Math.floor(Math.random() * 4);