function changeImg(which,howmany){


  for (i=1; i<=howmany; i++) {
	document.getElementById('single_img_'+i).style.zIndex=1;
  }

  //$("single_img_"+which).removeClassName("single_invisible");
  //$("single_img_"+which).addClassName("z_index_top_look");
  document.getElementById('single_img_'+which).style.zIndex=1000;
  //document.getElementById('single_img_'+which).style.display=yes;
}






/*
function changeImg(which,howmany){


  for (i=1; i<=howmany; i++) {
    //$("single_img_"+i).addClassName("single_invisible");
    //$("single_img_"+i).removeClassName("z_index_top");
     document.getElementById('single_img_'+i).style.zIndex=1;

  }

  //$("single_img_"+which).removeClassName("single_invisible");
  //$("single_img_"+which).addClassName("z_index_top");
  document.getElementById('single_img_'+which).style.zIndex=1000;
}

*/





function changeImgFF(which,howmany){

  for (i=1; i<=howmany; i++) {
     document.getElementById('single_img_'+i).style.zIndex=1;
  }

  if (which < howmany) {
    which++;
  }

  document.getElementById('single_img_'+which).style.zIndex=1000;
}


function changeImgBack(which,howmany){

  for (i=1; i<=howmany; i++) {
     document.getElementById('single_img_'+i).style.zIndex=1;
  }

  if (which > 1) {
    which--;
  }

  document.getElementById('single_img_'+which).style.zIndex=1000;
}


function test(){

  document.getElementById('single_img_1').style.zIndex=5000;

}

function changeThumbs(active,pages) {

  for (i=0; i<pages; i++) {
    var hideId = 'thumb-navi-'+i;
    $(hideId).hide();
     var notActLink = 'thumbpages-'+i;
     $(notActLink).removeClassName("thumbpager_active");
  }

  var actLink = 'thumbpages-'+active;
  $(actLink).addClassName("thumbpager_active");

  var showId = 'thumb-navi-'+active;
  $(showId).show();
}