/////////////////////////////////////////////////// 
//
// change image in lower left corner of /tickets/
//
///////////////////////////////////////////////////
function changeBkg(){

//create array to hold the class names
var classList=new Array();
classList[0]="bcg_01";
classList[1]="bcg_02";
classList[2]="bcg_03";
classList[3]="bcg_04";
classList[4]="bcg_05";
classList[5]="bcg_06";
classList[6]="bcg_07";

//stores a random number from 0 to 6
randomNum=Math.floor(Math.random()*7);

//grabs the div box from the id
testBox=document.getElementById('bottomImageHolder');

//assigns the div box a random class name from the array
testBox.className += " " + classList[randomNum];
}

/* Custom onload function */
function addLoadEvent(func) {
  var oldonload = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = func;
  } else {
    window.onload = function() {
      oldonload();
      func();
    }
  }
}
/* trigger onload */
addLoadEvent(changeBkg);