var browserOK = false;
var pics;
if ( !browser_old() ) {
	 var browserOK = true;
   pics = new Array();
}

var objCount = 0;

function preload(first, second) {
  if (browserOK) {
    pics[objCount] = new Array();
    pics[objCount][0] = new Image();
    pics[objCount][0].src = first;
    pics[objCount][1] = new Image();
    pics[objCount][1].src = second;
    pics[objCount][2] = 'link_'+objCount;
    objCount++;
  }
}

function on(i){
  if (browserOK && i>=0 && i<objCount) {
    if (document.images[pics[i][2]] != null) {
        document.images[pics[i][2]].src = pics[i][1].src;
    }
  }
}

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