$_currslider   = 0;  

window.addEvent('domready', function(){
  $_int        = shgetid.periodical(8000);
});

function shgetid() {
  if($("gal_"+(shcurrslider($_currslider)+1)) == null) {
    shslide(0);
  } else {
    shslide(shcurrslider($_currslider)+1);
  }
}

function shslide($id) {
  if($id != shcurrslider($_currslider)) {
    $("gal_"+shcurrslider($_currslider)).removeClass('active');
    $("gal_"+$id).addClass('active');
  
    $('sh_slideshow_list').tween('top', ('-'+(($id*299)+($id*2))));
    $_currslider = $id;
	
	$clear($_int);
    
	$_int = shgetid.periodical(8000);
  }
}

function shcurrslider($curr) {
  if($curr == null || $curr == undefined || $curr < 0) {
    return 0;
  } else {
    return $curr;
  }
}