var C1_DD_3 = new Array();

C1_DD_3[0] = "<img src=\"link\/C1_DD_3.jpg\" width=\"600px\" height=\"75px\" border=\"0\" alt=\"网站程序升级公告\">";

C1_DD_3[1] = "";

C1_DD_3[2] = "";

C1_DD_3[3] = "";

showId = Math.floor(Math.random() * 4);
document.write(""+C1_DD_3[showId]+"");