/*
  
  for index random image
-------------------------------------------------------------------*/

var msg = new Array();

msg[0] = '<img src="images/index_main001.jpg" alt="" width="760" height="110">';
msg[1] = '<img src="images/index_main002.jpg" alt="" width="760" height="110">';
msg[2] = '<img src="images/index_main003.jpg" alt="" width="760" height="110">';

var no = Math.floor(Math.random() * msg.length);

document.write(msg[no]);