pics = new Array();
 var objCount = 0;
function preload (id, first, second, third) {  
  pics[objCount] = new Array(4);
  pics[objCount][0] = new Image();
  pics[objCount][0].src = first;
  pics[objCount][1] = new Image();
  pics[objCount][1].src = second;
  pics[objCount][2] = new Image();
  pics[objCount][2].src = third;
  pics[objCount][3] = id;
  objCount++;
}
function on(id)
{

  for (i = 0; i < objCount; i++)
  {
   if (document.getElementById(pics[i][3]) != null)
    if (id != pics[i][3])
    { 
     document.getElementById(pics[i][3]).src = pics[i][0].src;
	 
    }
    else
    {
     document.getElementById(pics[i][3]).src = pics[i][1].src;
    }
  }
}
function down(id)
{
  for (i = 0; i < objCount; i++)
  {
   if (document.getElementById(pics[i][3]) != null)
    if (id != pics[i][3])
    { 
     document.getElementById(pics[i][3]).src = pics[i][0].src;
    }
    else
    {
     document.getElementById(pics[i][3]).src = pics[i][2].src;
    }
  }
}

function off()
{
  for (i = 0; i < objCount; i++)
  {
   if (document.getElementById(pics[i][3]) != null) 
   document.getElementById(pics[i][3]).src = pics[i][0].src;
  }
}