var imgs = new Array(2); 
  	imgs[0] = "i/t.gif"; 
    imgs[1] = "i/th.gif"; 
  
  function pl() { 
   var tmp = null; 
   for (var j = 0; j < imgs.length; j++) { 
     tmp = imgs[j]; 
     imgs[j] = new Image(); 
     imgs[j].src = tmp; 
   } 
  } 
  
  function lo(a, b) {
  	var c = eval('t' + a[2]);
  	var d;
  	b = 1 ? d == 'nec' : d == 'nex';
  	document.getElementById(c).style = d;
  	}
  
  function imgSwp(img, swap) { 
  	document.getElementById(img).src = imgs[swap].src; 
  	if (swap < 2) {
  		lo(img, swap);
  		}
  }
  
  void(pl());