function showTopic(n){
	
	var cdesc;
	
	switch (n){
		case 1:
			cdesc = "<img src='img/ia/1.png' border='0' />";
			break;
		case 2:
			cdesc = "<img src='img/ia/2.png' border='0' />";
			break;
		case 3:
			cdesc = "<img src='img/ia/3.png' border='0' />";
			break;
		case 4:
			cdesc = "<img src='img/ia/4.png' border='0' />";
			break;
		case 5:
			cdesc = "<img src='img/ia/5.png' border='0' />";
			break;
		case 6:
			cdesc = "<img src='img/ia/6.png' border='0' />";
			break;
		case 0:
			cdesc = "<img src='img/ia/0.png' border='0' />";
			break;

		default:
			cdesc = "Весе равно ураааа!!!!!!";
	}
	desc.innerHTML = cdesc;
}

  var aryImages = new Array(2);

  aryImages[0] = "img/ia/1.png";
  aryImages[1] = "img/ia/2.png";
  aryImages[2] = "img/ia/3.png";
  aryImages[3] = "img/ia/4.png";
  aryImages[4] = "img/ia/5.png";
  aryImages[5] = "img/ia/6.png";
  
  for (i=0; i < aryImages.length; i++) {
    var preload = new Image();
    preload.src = aryImages[i];
  }

  function swap(imgIndex) {
	document['imgMain'].src = aryImages[imgIndex];
  }