var path = "asset/skiing";
var map = Array('ski_map.gif', 'arosa.gif', 'crans_montana.gif', 'flims.gif', 'grindelwald.gif', 'klosters.gif', 'zermatt.gif', 'madonna.gif','san_cassiano.gif', 'lech.gif', 'st_christoph.gif', 'zurs.gif');

function showMap(n)
{
  map_img = document.getElementById('map');
  map_img.src = path + "/" + map[n];
}

function img_preload()
{ 
  img_total = map.length;
  if (document.imageArray != undefined) delete document.imageArray;
  document.imageArray = new Array(img_total);
  for(var i=0; i < img_total; ++i)
  {
    document.imageArray[i] = document.createElement('img');
    document.imageArray[i].src = path + "/" + map[i];
  }
}

img_preload();