var ie4          = false;
var ie5          = false;
var ns4          = false;
var ns6          = false;
var mac          = false;
var running      = false;
var timerId      = null;
var delay        = 750;
var currentMenu  = null;
var previousMenu = null;
var currentSub   = null;
var previousSub  = null;
var pageId       = null;
var loaded       = false;

function randomImage(limit) {
  this_image = 0;
  //there is no #5 image...
  while (this_image < 1 || this_image > limit || this_image == 5) { this_image = Math.ceil(Math.random()*limit); }
  //alert(this_image);
  document.write('<img src="images/img_'+this_image+'.jpg" width="80" height="100" alt="" border="0">');
}