$(document).ready(init_project_page);


var idx = 0;

function init_project_page(){
  
    
  
}

function show_picture(i){
  if(i== idx)return;
  $('#screen_item_' + i).fadeIn();
  $('#picture_link_' + i).addClass('selected');
  $('#screen_item_' + idx).fadeOut();
  $('#picture_link_' + idx).removeClass('selected');
  idx = i;
}

function prev_picture(){
  var i = idx;
  i--;
  if(i <0) i = $('#picture_idx').children().length-1;  
  show_picture(i);  
}
function next_picture(){
  var i = idx;
  i++;
  if(i > $('#picture_idx').children().length-1) i = 0;
  show_picture(i);  

}