function initDocument(){
    
}

function viewImg(imgName, w_i, h_i){
    /*
      var xstr = 'scrollbars=no,toolbar=no,status=no,menubar=no,directories=no,location=no,resizable=yes,width='+Number(w_i+20)+',height='+Number(h_i+20);
      pageName = '/view_img.php?file='+imgName;
      var prodWindow = window.open(pageName, 'window'+Math.round(Math.random()*1000), xstr);
      if (prodWindow) prodWindow.focus();
      */
    var block = document.getElementById('view_photo');
    var h_b = block.offsetHeight;
    var h_d = Math.round((h_b - h_i) / 2);

    if (h_d > 0) h_d = ' style="margin-top:' + h_d + 'px"';
    else h_d = '';

    block.innerHTML = '<img src="'+imgName+'" width="'+w_i+'" height="'+h_i+'"' + h_d + ' alt="" />'
}

function selectPhoto(mode){
    if(mode == 'first'){
        sel = 1;
    }
    if(mode == 'last'){
        sel = html.length - 1;
    }
    if(mode == 'next' && sel < html.length -1){
        sel++;
    }
    if(mode == 'prev' && sel > 1){
        sel--;
    }
    
    b = document.getElementById('item_photo');
    b.innerHTML = html[sel]; 
    show = 0;
    
}

function slideshow(){
    timer_id = setTimeout('slide_view()', 3000); 
    show = 1;   
}

function slide_view(){
    b = document.getElementById('item_photo');
    b.innerHTML = html[sel]; 
    if(sel < html.length -1){
        sel++;
    }else sel = 1;
}

function onloadImage(){
    if(show == 1){
        slideshow();
    }
}