// Global variables

var browserAcceptable;
var px;
var objCount   = 0; 

// Code

browserAcceptable = document.images;
px  = new Array();

function preload(name, firstDisplay, rollOverDisplay) {  
  if (browserAcceptable) {
  px[objCount] = new Array(3);
  px[objCount][0] = new Image();
  px[objCount][0].src = firstDisplay;
  px[objCount][1] = new Image();
  px[objCount][1].src = rollOverDisplay;
  px[objCount][2] = name;
  objCount++;
  }
}

function on(name){
  if (browserAcceptable) {
    for (i = 0; i < objCount; i++) {
      if (document.images[px[i][2]] != null) {
        if (name == px[i][2]) { 
	  document.images[px[i][2]].src = px[i][1].src;
        }
      }
    }
  }
}


function off(name){
  if (browserAcceptable) {
    for (i = 0; i < objCount; i++) {
      if (document.images[px[i][2]] != null) {
	if (name == px[i][2])
	  document.images[px[i][2]].src = px[i][0].src;
      }
    }
  }
}