function Photo_Gallery() {
  this.loaded = 0;
  this.queryitems = [];
  this.auto = 0;
  
  this.staff = 0;
  
  this.slideshow = new Array();
  this.slideshow[0] = new Array();
  this.slideshow[1] = new Array();
  this.slideshow[2] = new Array();
  this.slideshow[3] = 300;
  this.slideshow[4] = 300;
  this.slideshow[5] = new Array(1,0,0);
}

function photo_gallery_initialize() {
  with (this) {
    if (Site.loaded == 1) {
      loaded = 1;
      root = "http://www.cersf.ca/";
      CompileQuery();
    } else {
      window.setTimeout('Photos.Initialize()',10);
    }
  }
}

function photo_gallery_compilequery() {
  var fields;
  
  with (this) {
    if (loaded == 1) {
      fields = document.body.getElementsByTagName("INPUT");
      
      for (i = 0; i < fields.length; i++) {
        if (fields[i].id != "" && fields[i].name != "") {
          if (fields[i].id.search(/s-/gi) != -1) {
            queryitems[fields[i].id] = new Array(fields[i].name,fields[i].value);
          }
        }
      }
      
      if (queryitems['s-auto']) {
        auto = queryitems['s-auto'][1];
        auto = (auto == "1" || auto == "-1" ? auto : "-1");
      }
      
    }
  }
}

function photo_gallery_addtoquery(item,value,s) {
  with (this) {
    if (loaded == 1) {
      if (item) {
        if (item.id.search(/s-/gi) != -1) {
          item.value = value;
          
          CompileQuery();
          
          if (s == 1 && auto == "1") {
            SubmitQuery();
          }
        }
      }
    }
  }
}

function photo_gallery_submitquery() {
  var query = "http://www.cersf.ca/photos/?x=1&";
  
  with (this) {
    if (loaded == 1) {
      for (i in queryitems) {
        if (queryitems[i][1] != "") {
          query += queryitems[i][0]+"="+queryitems[i][1]+"&";
        }
      }
      
      query = query.substr(0,query.length-1);
      
      location.href = query;
    }
  }
}

function photo_gallery_keypress(e) {
  var evt = e || window.event;
  var key = evt.which || evt.keyCode;
  
  with (this) {
    if (key == 13) {
      SubmitQuery();
    }
  }
}

function photo_gallery_addfileupload() {
  var field;
  var desc;
  var errors;
  var entries;
  var count;
  
  var i = 1;
  var x = 0;
  var div;
  var copy = "";
  
  with (this) {
    field = $('photo_file_1');
    desc = $('photo_desc_1');
    errors = $('photo_errors_1');
    entries = $('photo_entries');
    count = $('photo_count');
    
    if (field && desc && entries && errors && count) {
      while (x == 0) {
        if ($('photo_file_'+i)) {
          i++;
        } else {
          x = i;
        }
      }
      
      if (x < 11) {
        div = document.createElement("div");
        div.id = "photo_file_"+x;
        
        copy = field.innerHTML.replace(/photo_desc_1/gi,"photo_desc_"+x);
        copy = copy.replace(/photo_errors_1/gi,"photo_errors_"+x);
        copy = copy.replace(/File #1/gi,"File #"+x);
        
        div.innerHTML = copy;
        entries.insertBefore(div,null);
        
        if ($('photo_errors_'+x)) {
          $('photo_errors_'+x).style.visibility = "hidden";
          $('photo_errors_'+x).style.display = "none";
        }
        
        count.innerHTML = x;
      }
    }
  }
}

function photo_gallery_slideshow(p,opt) {
  var holder;
  var n = "";
  var w = 0;
  var h = 0;
  
  var img;
  var change = 0;
  var test = new Array();
      test[0] = 0;
      test[1] = 0;
  var resize = "";
  var percent = 0;
  
  var z = "";
  
  with (this) {
    if (slideshow[0].length == 0 && p) {
      slideshow[0] = p[0]; // list of file names
      slideshow[1] = p[1]; // list of widths
      slideshow[2] = p[2]; // list of heights
      slideshow[3] = p[3]; // maximum width
      slideshow[4] = p[4]; // maximum height
    }
    
    holder = $('photos_slideshow_holder');
    
    if (holder) {
      switch (opt) {
      case "pause":
        slideshow[5][2] = 1;
        break;
      case "start":
        if (slideshow[5][2] == 1) {
          slideshow[5][2] = 0;
          window.setTimeout('Photos.SlideShow()',10);
        }
        break;
      case "next":
        if (slideshow[5][0] != 1) {
          slideshow[5][1] = (slideshow[5][1]+1 > (slideshow[0].length-1) ? 0 : slideshow[5][1]+1);
          change = 1;
        }
        break;
      case "previous":
        if (slideshow[5][0] != 1) {
          slideshow[5][1] = (slideshow[5][1]-1 < 0 ? (slideshow[0].length-1) : slideshow[5][1]-1);
          change = 1;
        }
        break;
      default:
        if (slideshow[5][2] != 1) {
          if (slideshow[5][0] != 1) {
            slideshow[5][1] = (slideshow[5][1]+1 > (slideshow[0].length-1) ? 0 : slideshow[5][1]+1);
            change = 1;
          }
          
          slideshow[5][0] = 0;
          
          if (change == 0) {
            window.setTimeout('Photos.SlideShow()',2000);
          }
        }
        break;
      }
      
      if (change == 1) {
        n = slideshow[0][slideshow[5][1]];
        w = slideshow[1][slideshow[5][1]];
        h = slideshow[2][slideshow[5][1]];
        
        holder.innerHTML = "";
        
        test[0] = (w > slideshow[3] ? (w-slideshow[3]) : 0);
        test[1] = (h > slideshow[4] ? (h-slideshow[4]) : 0);
        
        if (test[0] == 0 && test[1] == 0) {
          resize = "-";
        } else {
          resize = ((test[0]/w) == (test[1]/h) ? "w" : ((test[0]/w) > (test[1]/h) ? "w" : "h"));
        }
        
        if (resize != "-") {
          switch (resize) {
          case "w":
            percent = 1-((w - slideshow[3])/w);
            w = Utility.Round((w*percent),0);
            h = Utility.Round((h*percent),0);
            
            if (h > slideshow[4]) {
              percent = 1-((h - slideshow[4])/h);
              w = Utility.Round((w*percent),0);
              h = Utility.Round((h*percent),0);
            }
            break;
          case "h":
            percent = 1-((h - slideshow[4])/h);
            w = Utility.Round((w*percent),0);
            h = Utility.Round((h*percent),0);
            
            if (w > slideshow[3]) {
              percent = 1-((w - slideshow[3])/w);
              w = Utility.Round((w*percent),0);
              h = Utility.Round((h*percent),0);
            }
            break;
          }
        }
        
        if (staff == 1) {
          z += "Original: "+slideshow[1][slideshow[5][1]]+"x"+slideshow[2][slideshow[5][1]]+"<br>";
          z += "New: "+w+"x"+h;
          //$('slideshow_test').innerHTML = z;
        }
        
        holder.innerHTML = "<img src = \"http://www.cersf.ca/"+n+"\" border = \"0\" hspace = \"0\" vspace = \"0\" width = \""+w+"\" height = \""+h+"\" alt = \"\" title = \"\">";
        
        window.setTimeout('Photos.SlideShow()',6000);
      }
    } else {
      window.setTimeout('Photos.SlideShow()',20);
    }
  }
}

Photo_Gallery.prototype.Initialize = photo_gallery_initialize;
Photo_Gallery.prototype.CompileQuery = photo_gallery_compilequery;
Photo_Gallery.prototype.AddToQuery = photo_gallery_addtoquery;
Photo_Gallery.prototype.SubmitQuery = photo_gallery_submitquery;
Photo_Gallery.prototype.KeyPress = photo_gallery_keypress;
Photo_Gallery.prototype.AddFileUpload = photo_gallery_addfileupload;
Photo_Gallery.prototype.SlideShow = photo_gallery_slideshow;

var Photos = new Photo_Gallery();
    Photos.Initialize();