git.defcon.no Git - plsgen/blob - nav.js

   1 var prev = null;
   2 var next = null;
   3 var index = null;
   4
   5 var preloaded = [];
   6
   7 function key_handler ( e )
   8 {
   9         var key = (window.event) ? event.keyCode : e.keyCode;
  10         if ( (key == 37) && (prev != null) )
  11         {
  12                 window.location = prev + '.html';
  13         }
  14         if ( (key == 39) && (next != null) )
  15         {
  16                 window.location = next + '.html';
  17         }
  18         if (key == 27) window.location = "index.html";
  19         if ( (key == 38) && (index != null) ) window.location = index;
  20         return;
  21 }
  22 function img_preload ( image )
  23 {
  24         var image_thumb = new Image();
  25         image_thumb.src = 'thumb/' + image;
  26         preloaded.push(image_thumb);
  27
  28         var image_view  = new Image();
  29         image_view.src  = 'view/' + image;
  30         preloaded.push(image_view);
  31 }
  32
  33 function nav_set_target ( target, direction )
  34 {
  35         if ( target )
  36         {
  37                 if ( direction == 0 ) prev = target;
  38                 if ( direction == 1 ) next = target;
  39                 var img_regx = /.*\.(jpg|JPG|jpeg|JPEG|png|PNG|gif|GIF)$/;
  40                 if ( target.match( img_regx ) )
  41                         img_preload( target );
  42         }
  43 }
  44
  45 function nav_reg_prev ( target )
  46 { nav_set_target(target, 0); }
  47
  48 function nav_reg_next ( target )
  49 { nav_set_target(target, 1); }
  50
  51 function nav_reg_index( target )
  52 { index = target; }
  53
  54 function nav_reg_onkeypress()
  55 { document.onkeyup = key_handler; }