img = new Array();
img[0] = "images/conceptimage/c01.jpg";
img[1] = "images/conceptimage/c02.jpg";
img[2] = "images/conceptimage/c03.jpg";
img[3] = "images/conceptimage/c04.jpg";
img[4] = "images/conceptimage/c05.jpg";
n = Math.floor(Math.random()*img.length);
document.write("<img src='"+img[n]+"' alt='GateBridge' border='0'>");