var bgimg = "";
bgimg = "<td background='sidebar_default.gif' bgcolor='#000080' align='center' valign='top' width=" + tblwidth + ">";
if (Math.random() > 0.5) bgimg = "<td background='sidebar_wetprint.gif' bgcolor='#000080' align='center' valign='top' width=" + tblwidth + ">";
document.write(bgimg);