var bgNum = Math.round(Math.random() * 2)

bgSel = new Array(3);
bgSel[0] = "http://www.sunway.ie/common/images/header/european_header1.jpg";
bgSel[1] = "http://www.sunway.ie/common/images/header/european_header2.jpg";
bgSel[2] = "http://www.sunway.ie/common/images/header/european_header3.jpg";

var base = bgSel[bgNum];