img = new Array();
img[0] = "images/left_image01.jpg";
img[1] = "images/left_image02.jpg";
img[2] = "images/left_image03.jpg";
img[3] = "images/left_image04.jpg";
n = Math.floor(Math.random()*img.length);
document.write("<img src='"+img[n]+"' border='0' width='198' height='201' alt='Sushi Bar Hayama'>");