function get_event(e)
{
	var obj = e;
	if ( window.event )
	{
		obj.layerX = e.offsetX;
		obj.layerY = e.offsetY;
		obj.target = e.srcElement;
		obj.preventDefault = function() { event.returnValue = false; }
		obj.stopPropagation = function() { event.cancelBubble = true; }
	}
	return( obj );
}

var preloadBin = new Array();

function changeImg(link){
  var img = link.getElementsByTagName('IMG')[0];
  var end = img.src.lastIndexOf('.');
  var ext = img.src.substr((end+1), 3);

  if( img.src.substr( (end-2), 2 ) == '_h' ){
    img.src = preloadBin[link.key][0].src;
  }else{
    img.src = preloadBin[link.key][1].src;
  }
}

function menuHover(id){
  var menu = document.getElementById(id);
  
  if(menu){
    var link = menu.getElementsByTagName('A');

    for(x=0, y=link.length; x<y; x++){
      var img = link[x].getElementsByTagName('IMG')[0];

      if(img){
        var end = img.src.lastIndexOf('.');
        var ext = img.src.substr((end+1), 3);
        
        preloadBin[preloadBin.length] = new Array();
        //initial image
        preloadBin[(preloadBin.length-1)][0] = new Image();
        preloadBin[(preloadBin.length-1)][0].src = img.src;
        //hover image
        preloadBin[(preloadBin.length-1)][1] = new Image();
        preloadBin[(preloadBin.length-1)][1].src = img.src.substr(0, end) + '_h.' + ext;
        
        link[x].key = (preloadBin.length-1);
        link[x].onmouseover = function(e){ changeImg(this); e = get_event(e || event); e.stopPropagation(); e.preventDefault(); }
        link[x].onmouseout = function(e){ changeImg(this); e = get_event(e || event); e.stopPropagation(); e.preventDefault(); }
      }
    }
  }
}

function resizeVP(id){
  var obj = document.getElementById(id);

  if(obj){
    obj.style.height = document.getElementsByTagName('BODY')[0].offsetHeight + 'px';
    obj.style.width = document.getElementsByTagName('BODY')[0].offsetWidth + 'px';
  }
}

var loading = new Image();
loading.src = 'app_themes/ar/images/loading.gif';

function unhide(x){
  var parent = document.getElementById('b_img_container_main');
  var label = document.getElementById('label');
  label.innerHTML = bigs[x][1];

  var ScrollTop = document.body.scrollTop;


  if (ScrollTop == 0) {
      if (window.pageYOffset)
          ScrollTop = window.pageYOffset;
      else
          ScrollTop = (document.body.parentElement) ? document.body.parentElement.scrollTop : 0;
  }

  parent.style.top = ScrollTop + 'px';
  document.getElementById('b_img_bg').style.display = 'block';
  document.getElementById('b_img_container').style.display = 'block';
  var img = new Image();
  var big = parent.getElementsByTagName('IMG')[0];
  img.onload = function() { big.src = this.src; big.className = 'big'; }
  img.src = bigs[x][0];
  curr = x;
  
 
  //big.src = img.src;
  //big.className = 'big';
}

function showloader(){ 
  var parent = document.getElementById('b_img_container_main');
  parent.getElementsByTagName('IMG')[0].src = loading.src
  parent.getElementsByTagName('IMG')[0].className = 'loading';
}

function hide(id){
  document.getElementById(id).style.display = 'none';
  showloader();
}

function showprev(){
  showloader();

  x = curr - 1;

  if(x < 0){ x = (bigs.length-1); }

  unhide(x);
}

function shownext(){
  showloader();

  x = curr + 1;

  if(x > (bigs.length-1)){ x = 0; }

  unhide(x);
}

window.onload = function() { menuHover('menu'); menuHover('submenu'); menuHover('prevnext'); menuHover('pag'); resizeVP('b_img_bg') };



function limitText(limitField, limitCount, limitNum) {
	if (limitField.value.length > limitNum) {
		limitField.value = limitField.value.substring(0, limitNum);
	} else {
		limitCount.value = limitNum - limitField.value.length;
	}
}



function bookmark(url, title) {
    if ((navigator.appName == "Microsoft Internet Explorer") && (parseInt(navigator.appVersion) >= 4)) {
        window.external.AddFavorite(url, title);
    } else if (navigator.appName == "Netscape") {
        window.sidebar.addPanel(title, url, "");
    } else {
        alert("Press CTRL-D (Netscape) or CTRL-T (Opera) to bookmark");
    }
}


function clearbox(pbox, pdefault) {
    if (pbox.value == pdefault) {
        pbox.value = "";
    }
}

function resetbox(pbox, pdefault) {
    if (pbox.value == "") {
        pbox.value = pdefault;
    }
}