function egZoom(smallImageContId,smallImageId,bigImageContId,bigImageId){
  this.recalculating=false;
  this.smallImageCont=_el(smallImageContId);
  this.smallImage=_el(smallImageId);
  this.bigImageCont=_el(bigImageContId);
  this.bigImage=_el(bigImageId);
  this.pup=0;
  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=""
};

egZoom.prototype.checkcoords = function(e){
  if(e.clientX>parseInt(this.smallImageCont.offsetLeft+this.smallImageSizeX)){this.hiderect()}
  if(e.clientX<parseInt(this.smallImageCont.offsetLeft)){this.hiderect()}
  if(e.clientY>parseInt(this.smallImageCont.offsetTop+this.smallImageSizeY)){this.hiderect()}
  if(e.clientY<parseInt(this.smallImageCont.offsetTop)){this.hiderect()}
};

egZoom.prototype.mousemove = function(e){
  if(ua=="gecko"){
    e.cancelBubble=true;e.preventDefault();e.stopPropagation()
  }else if(ua=="msie"||ua=="opera"){
    window.event.cancelBubble=true
  }
  if(this.recalculating){return}
  this.recalculating=true;
  var smallImg=this.smallImage;
  var smallX=0;
  var smallY=0;
  if(ua=="gecko"||ua=="opera"){
    var tag=smallImg;
    while(tag.tagName!="BODY"){
      smallY+=tag.offsetTop;
      smallX+=tag.offsetLeft;
      tag=tag.offsetParent
    }
  }
  if(ua=="msie"){
    this.positionX=event.x;
    this.positionY=event.y+document.body.scrollTop
  }
  else {
    this.positionX=e.clientX-smallX;
    this.positionY=e.clientY-smallY
  }
  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(createMethodReference(this,"showrect"),10)
};
  
egZoom.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";
  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.recalculating=false
};

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

egZoom.prototype.initPopup = function(){
  this.pup=document.createElement("DIV");
  if(ua=="msie"){
    this.pup.className="zoomBox ie"
  }
  else {
    this.pup.className="zoomBox";
    this.pup.style.background="url("+this.baseuri+"/back.png"+")"
  }
  this.popupSizeX=(parseInt(this.bigImageCont.style.width)-3)/(this.bigImageSizeX/this.smallImageSizeX);
  this.popupSizeY=(parseInt(this.bigImageCont.style.height)-19-3)/(this.bigImageSizeY/this.smallImageSizeY);
  this.pup.style.width=this.popupSizeX+"px";
  this.pup.style.height=this.popupSizeY+"px";
  this.smallImageCont.appendChild(this.pup)
};

egZoom.prototype.initBigContainer = function(){
  var bigimgsrc=this.bigImage.src;
  while(this.bigImageCont.firstChild){
    this.bigImageCont.removeChild(this.bigImageCont.firstChild)
  }
  var f=document.createElement("DIV");
  f.className="zoomH1";
  f.innerHTML="";
  this.bigImageCont.appendChild(f);
  var ar1=document.createElement("DIV");
  ar1.style.overflow="hidden";
  this.bigImageCont.appendChild(ar1);
  this.bigImage=document.createElement("IMG");
  this.bigImage.src=bigimgsrc;
  this.bigImage.style.position="relative";
  ar1.appendChild(this.bigImage)
};

egZoom.prototype.initZoom = function(){
  var elements=document.getElementsByTagName("script");
  for(var i=0;i<elements.length;i++){
    if(elements[i].src&&(elements[i].src.indexOf("egZoom.js")!=-1||elements[i].src.indexOf("packed.js")!=-1)){
      var src=elements[i].src;
      srcMode=(src.indexOf("_src")!=-1)?"_src":"";
      src=src.substring(0,src.lastIndexOf("/"));this.baseuri=src;break
    }
  }
  this.bigImageSizeX=this.bigImage.width;
  this.bigImageSizeY=this.bigImage.height;
  this.smallImageSizeX=this.smallImage.width;
  this.smallImageSizeY=this.smallImage.height;
  this.initBigContainer();
  this.initPopup();
  myAddEventListener(window.document,"mousemove",createMethodReference(this,"checkcoords"));
  myAddEventListener(this.smallImageCont,"mousemove",createMethodReference(this,"mousemove"))
};