var browser = false;
browser = document.images;

var loaded = 0;

// set up variables
if (browser) initImages();

// set up and pre-load all mouseOver images
function initImages() {

  nav_bt10 = new Image(148,87);
	nav_bt10.src = 'images/bt_rewind.0.jpg';
  nav_bt11 = new Image(148,87);
  nav_bt11.src = 'images/bt_rewind.1.jpg';

  nav_bt20 = new Image(148,87);
	nav_bt20.src = 'images/bt_late.0.jpg';
  nav_bt21 = new Image(148,87);
  nav_bt21.src = 'images/bt_late.1.jpg';
  
  nav_bt30 = new Image(148,87);
	nav_bt30.src = 'images/bt_toast.0.jpg';
  nav_bt31 = new Image(148,87);
  nav_bt31.src = 'images/bt_toast.1.jpg';
 
       
	loaded = 1;
  }

// turn the inages ON
function overRunImg(imgName)  {
  if (browser) {
    x = eval("nav_" + imgName + "1.src");
    eval("document.nav_" + imgName + ".src = x");
    }
  }

// turn the inages OFF
function outRunImg(imgName)  {
  if (browser) {
    a = eval("nav_" + imgName + "0.src");
    eval("document.nav_" + imgName + ".src = a");
    }
  }