(function($){
  $.fn.jqueryzoom=function(options){
    var settings={xzoom:200,yzoom:200,awidth:$(this).width(),aheight:$(this).height(),offset:10,position:"right",lens:1,preload:1};
    if(options){$.extend(settings,options)}
    var noalt='';
    $(this).hover(function(){
      if($(this).children('img').attr('jqimg')=="")return false;
      var imageLeft=$(this).offset().left;
      var imageTop=$(this).offset().top;
      var imageWidth=$(this).children('img').get(0).offsetWidth;
      var imageHeight=$(this).children('img').get(0).offsetHeight;
      noalt=$(this).children("img").attr("alt");
      var bigimage=$(this).children("img").attr("jqimg");
      $(this).children("img").attr("alt",'');
      if($("div.zoomdiv").get().length==0){
        $("<div class='zoomdiv'><img class='bigimg' src='"+bigimage+"'/></div>").appendTo("body");
        $(this).append("<div class='jqZoomPup'>&nbsp;</div>");
      }
      if(settings.position=="right"){               
        if(imageLeft+imageWidth+settings.offset+settings.xzoom>screen.width){
          leftpos=imageLeft-settings.offset-settings.xzoom
        }else{
          leftpos=imageLeft+settings.awidth+settings.offset
        }
      }else{
        leftpos=imageLeft-settings.xzoom-settings.offset;
        if(leftpos<0){
          leftpos=imageLeft+settings.aheight+settings.offset
        }
      }
      $("div.zoomdiv").css({top:imageTop,left:leftpos});
      $("div.zoomdiv").width(settings.xzoom);
      $("div.zoomdiv").height(settings.yzoom);
      $("div.zoomdiv").show();
      if(!settings.lens){
        $(this).css('cursor','crosshair')
      }
      $(document.body).mousemove(function(e){
        mouse=new MouseEvent(e);
        if(mouse.x<imageLeft+(settings.awidth-imageWidth)/2||mouse.x>imageLeft+(settings.awidth+imageWidth)/2||mouse.y<imageTop+(settings.aheight-imageHeight)/2||mouse.y>imageTop+(settings.aheight+imageHeight)/2){
            //alert("ggg");
            $(this).children("img").attr("alt",noalt);
            if(settings.lens){
                $("div.jqZoomPup").hide();
            };
            $("div.zoomdiv").hide();
            return false;
        }
            if(settings.lens){
                $("div.jqZoomPup").show();
            };
            $("div.zoomdiv").show();
            var bigwidth=$(".bigimg").get(0).offsetWidth;
            var bigheight=$(".bigimg").get(0).offsetHeight;
            var scaley='x';
            var scalex='y';
            if(isNaN(scalex)|isNaN(scaley)){
              var scalex=(bigwidth/imageWidth);
              var scaley=(bigheight/imageHeight);
              $("div.jqZoomPup").width((settings.xzoom)/scalex);
              $("div.jqZoomPup").height((settings.yzoom)/scaley);
              if(settings.lens){
                $("div.jqZoomPup").css('visibility','visible')
              }
            }
            xpos=mouse.x-$("div.jqZoomPup").width()/2-imageLeft;
            ypos=mouse.y-$("div.jqZoomPup").height()/2-imageTop;
            if(settings.lens){
                xpos=(mouse.x-$("div.jqZoomPup").width()/2<imageLeft+(settings.awidth-imageWidth)/2)?(settings.awidth-imageWidth)/2:(mouse.x+$("div.jqZoomPup").width()/2>(settings.awidth+imageWidth)/2+imageLeft)?((settings.awidth+imageWidth)/2-$("div.jqZoomPup").width()-2):xpos;
                ypos=(mouse.y-$("div.jqZoomPup").height()/2<imageTop+(settings.aheight-imageHeight)/2)?(settings.aheight-imageHeight)/2:(mouse.y+$("div.jqZoomPup").height()/2>(settings.aheight+imageHeight)/2+imageTop)?((settings.aheight+imageHeight)/2-$("div.jqZoomPup").height()-2):ypos
            }
            if(settings.lens){
              $("div.jqZoomPup").css({top:ypos,left:xpos})
            }
            scrolly=ypos-((settings.aheight-imageHeight)/2);
            $("div.zoomdiv").get(0).scrollTop=scrolly*scaley;
            scrollx=xpos-(settings.awidth-imageWidth)/2;
            $("div.zoomdiv").get(0).scrollLeft=(scrollx)*scalex
      })
    },function(){
      $(this).children("img").attr("alt",noalt);
      $(document.body).unbind("mousemove");
      if(settings.lens){
        $("div.jqZoomPup").remove()
      }
      $("div.zoomdiv").remove()
    });
    count=0;
    if(settings.preload){
      $('body').append("<div style='display:none;' class='jqPreload"+count+"'>sdsdssdsd</div>");
      $(this).each(function(){
        var imagetopreload=$(this).children("img").attr("jqimg");
        var content=jQuery('div.jqPreload'+count+'').html();
        jQuery('div.jqPreload'+count+'').html(content+'<img src=\"'+imagetopreload+'\">')
      })
    }
  }                 
})(jQuery);
function MouseEvent(e){
  this.x=e.pageX;
  this.y=e.pageY
}