var visualsoftZoom_ua = 'msie';
var W = navigator.userAgent.toLowerCase();

if(W.indexOf("opera") != -1)
{
  visualsoftZoom_ua = 'opera';
}
else if(W.indexOf("msie") != -1)
{
  visualsoftZoom_ua = 'msie';
}
else if(W.indexOf("mozilla") != -1)
{
  visualsoftZoom_ua = 'gecko';
}

var zoom_loaded = false;
var VisualsoftZoom_zooms = new Array();

function _el(id)
{
  return document.getElementById(id)
};

function visualsoftView_ia()
{
  return false
};

function visualsoftZoom_addEventListener(obj,event,listener)
{
  if(visualsoftZoom_ua == 'gecko' || visualsoftZoom_ua == 'opera')
  {
    obj.addEventListener(event,listener,false);
  }
  else if(visualsoftZoom_ua == 'msie')
  {
    obj.attachEvent("on"+event,listener);
  }
};

function visualsoftZoom_removeEventListener(obj,event,listener)
{
  if(visualsoftZoom_ua == 'gecko' || visualsoftZoom_ua == 'opera')
  {
    obj.removeEventListener(event,listener,false);
  }
  else if(visualsoftZoom_ua == 'msie')
  {
    obj.detachEvent("on"+event,listener);
  }
};

function visualsoftZoom_createMethodReference(object,methodName)
{
  var args = arguments;

  return function()
         {
            object[methodName].apply(object,arguments,"");
         }
};

function visualsoftZoom(smallImageContId,smallImageId,bigImageContId,bigImageId,settings)
{
  this.recalculating = false;
  this.smallImageCont = _el(smallImageContId);
  this.smallImage = _el(smallImageId);
  this.bigImageCont = _el(bigImageContId);
  this.bigImage = _el(bigImageId);
  this.pup = 0;
  this.settings = settings;
  this.bigImageSizeX = 0;
  this.bigImageSizeY = 0;
  this.smallImageSizeX = 0;
  this.smallImageSizeY = 0;
  this.popupSizeX = 20;
  this.popupSizey = 20;
  this.positionX = 0;
  this.positionY = 0;
  this.baseuri = '';
  this.safariOnLoadStarted = false;
  VisualsoftZoom_zooms.push(this);
};

visualsoftZoom.prototype.checkcoords = function(e)
{
  var y=0;
  var x=0;

  if(visualsoftZoom_ua == 'msie')
  {
    y = e.clientY;
    x = e.clientX;

    if(document.body && (document.body.scrollLeft || document.body.scrollTop))
    {
      y = e.clientY + document.body.scrollTop;
      x = e.clientX + document.body.scrollLeft
    }
    else if(document.documentElement && (document.documentElement.scrollLeft || document.documentElement.scrollTop))
    {
      y= e.clientY + document.documentElement.scrollTop;
      x= e.clientX + document.documentElement.scrollLeft;
    }
  }
  else
  {
    y = e.clientY;
    x = e.clientX;

    if(W.indexOf("safari") == -1)
    {
      y += window.pageYOffset;
      x += window.pageXOffset
    }
  }

  smallY = smallX = 0;
  var tag = this.smallImage;

  while(tag.tagName != "BODY" && tag.tagName != "HTML")
  {
    smallY += tag.offsetTop;
    smallX += tag.offsetLeft;
    tag = tag.offsetParent
  }

  if(x > parseInt(smallX + this.smallImageSizeX))
  {
    this.hiderect();
    return false;
  }

  if(x < parseInt(smallX))
  {
    this.hiderect();
    return false;
  }

  if(y > parseInt(smallY + this.smallImageSizeY))
  {
    this.hiderect();
    return false;
  }

  if(y < parseInt(smallY))
  {
    this.hiderect();
    return false;
  }
  return true
};
/*
visualsoftZoom.prototype.mousedown = function(e)
{
  if (this.bigImage.src != 'http://www.feedem.co.uk/images/nopic.gif')
  {
    if(visualsoftZoom_ua == 'gecko')
    {
      e.cancelBubble = true;
      e.preventDefault();
      e.stopPropagation();
    }
    else if(visualsoftZoom_ua == 'msie' || visualsoftZoom_ua == 'opera')
    {
      window.event.cancelBubble = true;
    }

    this.smallImageCont.style.cursor = 'move';
  }
};

visualsoftZoom.prototype.mouseup = function(e)
{
  if (this.bigImage.src != 'http://www.feedem.co.uk/images/nopic.gif')
  {
    if(visualsoftZoom_ua == 'gecko')
    {
      e.cancelBubble = true;
      e.preventDefault();
      e.stopPropagation();
    }
    else if(visualsoftZoom_ua == 'msie' || visualsoftZoom_ua == 'opera')
    {
      window.event.cancelBubble = true;
    }
    this.smallImageCont.style.cursor = 'default';
  }
};
*/
visualsoftZoom.prototype.mousemove = function(e)
{
  if (this.bigImage.src != 'http://www.feedem.co.uk/images/nopic.gif')
  {
    if(visualsoftZoom_ua == 'gecko')
    {
      e.cancelBubble = true;
      e.preventDefault();
      e.stopPropagation();
    }
    else if(visualsoftZoom_ua == 'msie' || visualsoftZoom_ua == 'opera')
    {
      window.event.cancelBubble = true;
    }

    for(i=0; i < VisualsoftZoom_zooms.length; i++)
    {
      if(VisualsoftZoom_zooms[i] != this)
      {
        VisualsoftZoom_zooms[i].checkcoords(e);
      }
    }

    if(this.settings && this.settings["drag_mode"] == true)
    {
      if(this.smallImageCont.style.cursor != 'move')
      {
        return
      }
    }

    if(this.recalculating)
    {
      return
    }

    if(!this.checkcoords(e))
    {
      return
    }

    this.recalculating = true;

    var smallImg = this.smallImage;
    var smallX = 0;
    var smallY = 0;

    if(visualsoftZoom_ua == 'gecko' || visualsoftZoom_ua == 'opera')
    {
      var tag=smallImg;

      while(tag.tagName != "BODY" && tag.tagName != "HTML")
      {
        smallY += tag.offsetTop;
        smallX += tag.offsetLeft;
        tag = tag.offsetParent;
      }
    }

    if(visualsoftZoom_ua == 'msie')
    {
      this.positionX = event.x - this.smallImage.offsetLeft;
      var scrollTop = 0;
      this.positionY = event.y + scrollTop;
    }
    else
    {
      this.positionX = e.clientX - smallX;
      this.positionY = e.clientY - smallY;

      if(W.indexOf("safari") == -1)
      {
        this.positionX += window.pageXOffset;
        this.positionY += window.pageYOffset;
      }
    }

    if((this.positionX + this.popupSizeX / 2) >= this.smallImageSizeX)
    {
      this.positionX = this.smallImageSizeX - this.popupSizeX / 2;
    }

    if((this.positionY + this.popupSizeY / 2) >= this.smallImageSizeY)
    {
      this.positionY = this.smallImageSizeY - this.popupSizeY / 2;
    }

    if((this.positionX - this.popupSizeX / 2) <= 0)
    {
      this.positionX = this.popupSizeX / 2;
    }

    if((this.positionY - this.popupSizeY / 2) <= 0)
    {
      this.positionY=this.popupSizeY / 2;
    }

    setTimeout(visualsoftZoom_createMethodReference(this,"showrect"),10);
  }
};

visualsoftZoom.prototype.showrect = function()
{
  this.pup.style.left = (this.positionX - this.popupSizeX / 2) + 'px';
  this.pup.style.top = (this.positionY - this.popupSizeY / 2) + 'px';
  this.pup.style.visibility = "visible";
  this.pup.onclick = document.getElementById('sim2_link').onclick;

  perX = parseInt(this.pup.style.left) * (this.bigImageSizeX / this.smallImageSizeX);
  perY = parseInt(this.pup.style.top) * (this.bigImageSizeY / this.smallImageSizeY);

  this.bigImage.style.left = (-perX)+ 'px';
  this.bigImage.style.top = (-perY)+ 'px';
  this.bigImageCont.style.display = 'block';
  this.bigImageCont.style.visibility = 'visible';
  this.bigImage.style.display = 'block';
  this.bigImage.style.visibility = 'visible';
  this.recalculating = false;
};

visualsoftZoom.prototype.hiderect=function()
{
  this.pup.style.visibility = "hidden";
  this.bigImageCont.style.display = 'none';
  this.bigImageCont.style.visibility = 'visible';
};

visualsoftZoom.prototype.initPopup = function()
{
  pups = document.getElementsByName('zoomPup');
  if(pups.length)
  {
    for(i=0;i<pups.length;i++)
    {
      this.smallImageCont.removeChild(pups[i]);
    }
  }
//alert((parseInt(498)-3) / (this.bigImageSizeX / this.smallImageSizeX));
  this.pup = document.createElement("DIV");
  this.pup.className = 'zoomPup';
  this.pup.setAttribute("name", "zoomPup");
  this.pup.setAttribute("id", "zoomPup");
  this.popupSizeX = (parseInt(this.smallImageSizeX / 2));
  this.popupSizeY = (parseInt(this.smallImageSizeY / 2));
  this.pup.style.width = this.popupSizeX + 'px';
  this.pup.style.height = this.popupSizeY + 'px';
  this.smallImageCont.appendChild(this.pup);
  this.smallImageCont.unselectable = "on";
  this.smallImageCont.style.MozUserSelect = "none";
  this.smallImageCont.onselectstart = visualsoftView_ia;
  this.smallImageCont.oncontextmenu = visualsoftView_ia
};

visualsoftZoom.prototype.initBigContainer=function()
{
  var bigimgsrc = this.bigImage.src;

  while(this.bigImageCont.firstChild)
  {
    this.bigImageCont.removeChild(this.bigImageCont.firstChild);
  }

  if(visualsoftZoom_ua == 'msie')
  {

    pups = document.getElementsByName('zoomPup_iframe');
    if(pups.length)
    {
      for(i=0;i<pups.length;i++)
      {
        //this.smallImageCont.removeChild(pups[i]);
      }
    }

    var f = document.createElement("IFRAME");
    f.setAttribute("name", "zoomPup_iframe");
    f.setAttribute("id", "zoomPup_iframe");
    f.style.left = '0px';
    f.style.top = '0px';
    f.style.position = 'absolute';
    f.style.filter = 'progid:DXImageTransform.Microsoft.Alpha(style=0,opacity=0)';
    f.style.width = this.bigImageCont.style.width;
    f.style.height = this.bigImageCont.style.height;
    f.frameBorder = 0;

    this.bigImageCont.appendChild(f)
  }

  var f = document.createElement("DIV");
  f.setAttribute("name", "zoomPup_div");
  f.setAttribute("id", "zoomPup_div");

  f.className = 'zoomHeader';
  f.innerHTML = ""; // A message can go here

  this.bigImageCont.appendChild(f);

  pups = document.getElementsByName('zoomPup_ar1');
  if(pups.length)
  {
    for(i=0;i<pups.length;i++)
    {
      //this.smallImageCont.removeChild(pups[i]);
    }
  }

  var ar1 = document.createElement("DIV");
  ar1.setAttribute("name", "zoomPup_ar1");
  ar1.setAttribute("id", "zoomPup_ar1");
  ar1.style.overflow = "hidden";

  this.bigImageCont.appendChild(ar1);

  pups = document.getElementsByName('zoomPup_bigimage');
  if(pups.length)
  {
    for(i=0;i<pups.length;i++)
    {
      //this.smallImageCont.removeChild(pups[i]);
    }
  }

  this.bigImage=document.createElement("IMG");
  this.bigImage.setAttribute("name", "zoomPup_bigimage");
  this.bigImage.setAttribute("id", "zoomPup_bigimage");
  this.bigImage.src=bigimgsrc;
  this.bigImage.style.position='relative';
  ar1.appendChild(this.bigImage)
};

visualsoftZoom.prototype.initZoom = function()
{
  //alert("initZoom");
  if(W.indexOf("safari") != -1)
  {
    if(!this.safariOnLoadStarted)
    {
      visualsoftZoom_addEventListener(this.bigImage,"load",visualsoftZoom_createMethodReference(this,"initZoom"));
      this.safariOnLoadStarted=true;
      return;
    }
  }
  else
  {
    if(!this.bigImage.complete || !this.smallImage.complete)
    {
      //clearTimeout(this.inittimeout);
      setTimeout(visualsoftZoom_createMethodReference(this,"initZoom"),100);
      //visualsoftZoom_createMethodReference(this,"initZoom");

      return;
    }
  }

  this.bigImageSizeX = this.bigImage.width;
  this.bigImageSizeY = this.bigImage.height;
  this.smallImageSizeX = this.smallImage.width;
  this.smallImageSizeY = this.smallImage.height;

  if(this.bigImageSizeX == 0 || this.bigImageSizeY == 0 || this.smallImageSizeX == 0 || this.smallImageSizeY == 0)
  {
    this.bigImage.src += '?' + Math.random();
    this.smallImage.src += '?' + Math.random();
    setTimeout(visualsoftZoom_createMethodReference(this,"initZoom"),100);
    return
  }

  this.smallImageCont.style.width=this.smallImage.width+'px';
  this.smallImageCont.style.height=this.smallImage.height+'px';

  this.initBigContainer();
  this.initPopup();

  visualsoftZoom_addEventListener(window.document,"mousemove",visualsoftZoom_createMethodReference(this,"checkcoords"));
  visualsoftZoom_addEventListener(this.smallImageCont,"mousemove",visualsoftZoom_createMethodReference(this,"mousemove"));

  zoom_loaded = true;
};

function changeImg(src)
{
  if(navigator.appName == "Microsoft Internet Explorer")
  {
  	//alert(navigator.appName);blendTrans(duration=1):

  	document.getElementById('sim2').style.filter='blendTrans(Duration=0.5)';
  	document.getElementById('sim2').filters[0].Apply();
  	document.getElementById('sim2').filters[0].Play();
  }

  //document.getElementById('sim2').src=src;
  document.images.sim2.src = src;

  setTimeout("checkImg('"+src+"')",100);

  //sim2 = _el('sim2');
  //sc2 = _el('sc2');
  //sc2.removeChild(sim2);
  //sim2 =document.createElement("IMG");
  //sim2.setAttribute("name", "sim2");
  //sim2.setAttribute("id", "sim2");
  //sim2.src=src;
  //sim.bigImage.style.position='relative';
  //sc2.appendChild(sim2);

  /*

  if(!document.images.sim2.complete)
  {
    setTimeout("checkImg('"+src+"')",100);
  }
  */

  return true;
}

function changeBigImg(src)
{
  //document.getElementsByName('bim2').src = src;
  //document.getElementsByName('bigImage').src = src;
  /*
  if(!is_ie6)
  {
    zoom.bigImageCont.removeChild(document.getElementById('zoomPup_ar1'));

    var ar1 = document.createElement("DIV");
    ar1.setAttribute("name", "zoomPup_ar1");
    ar1.setAttribute("id", "zoomPup_ar1");
    ar1.style.overflow = "hidden";

    zoom.bigImageCont.appendChild(ar1);

    zoom.bigImage=document.createElement("IMG");
    zoom.bigImage.setAttribute("name", "zoomPup_bigimage");
    zoom.bigImage.setAttribute("id", "zoomPup_bigimage");
    zoom.bigImage.src=src;
    zoom.bigImage.style.position='relative';
    ar1.appendChild(zoom.bigImage);
  }
  else
  {
    //alert("ie6 method");

    preload_image_object = new Image();
    preload_image_object.src = src;
    document.getElementById('bc2').innerHTML = '<img src="'+preload_image_object.src+'" id="bim2" />';
    //zoom = null;
    zoom = new visualsoftZoom('sc2', 'sim2', 'bc2', 'bim2');
    zoom.initZoom();

    if(!preload_image_object.complete)
    {
      setTimeout("changeBigImg('"+src+"')",100);
      return;
    }
  }
  */

  zoom.bigImageCont.removeChild(document.getElementById('zoomPup_ar1'));

  var ar1 = document.createElement("DIV");
  ar1.setAttribute("name", "zoomPup_ar1");
  ar1.setAttribute("id", "zoomPup_ar1");
  ar1.style.overflow = "hidden";

  zoom.bigImageCont.appendChild(ar1);

  zoom.bigImage=document.createElement("IMG");
  zoom.bigImage.setAttribute("name", "zoomPup_bigimage");
  zoom.bigImage.setAttribute("id", "zoomPup_bigimage");
  zoom.bigImage.src=src;
  zoom.bigImage.style.position='relative';
  ar1.appendChild(zoom.bigImage);

  if(!zoom.bigImage.complete)
  {
    setTimeout("checkBigImg('"+src+"')",100);
  }

  return true;
}

function checkImg(src)
{
  var sim2 = _el('sim2');
  if(!sim2.complete)
  {
    //alert("reloading small image");
    document.images.sim2.src = src;
    var imgcheck = setTimeout("checkImg('"+src+"')",500);
  }
  else
  {
    //alert("small image is loaded");
    clearTimeout(imgcheck);
    document.images.sim2.src = src;
  }
}

function checkBigImg(src)
{
  if(!zoom.bigImage.complete)
  {
    zoom.bigImage.src=src;
    var bigimgcheck = setTimeout("checkBigImg('"+src+"')",500);
  }
  else
  {
    clearTimeout(bigimgcheck);
  }
}

function changePopLink(image_id,product_id)
{
  document.getElementById('sim2_link').onclick = function(){popupWindow(image_id,product_id);};
}