//**************************************************************
// jQZoom allows you to realize a small magnifier window,close
// to the image or images on your web page easily.
//
// jqZoom version 1.2
// Author Doc. Ing. Renzi Marco(www.mind-projects.it)
// Released on Dec 05 2007
// i'm searching for a job,pick me up!!!
// mail: renzi.mrc@gmail.com
//**************************************************************

(function($){

		$.fn.jqueryzoom = function(options){

		var settings = {
				xzoom: 300,		//zoomed width default width
				yzoom: 300,		//zoomed div default width
				offset: 10,		//zoomed div default offset
				position: "right"  //zoomed div default position,offset position is to the right of the image
			};

			if(options) {
				$.extend(settings, options);
			}

            var noalt ='';

		$(this).hover(function(){

           
		    //var imageLeft = $(this).get(0).offsetLeft;
		    //var imageRight = $(this).get(0).offsetRight;
		    //var imageTop =  $(this).get(0).offsetTop;
		    var imageWidth = $(this).get(0).offsetWidth;
		    var imageHeight = $(this).get(0).offsetHeight;

            var imageLeft = getAbsolutePosition($(this).get(0)).x;
            var imageTop = getAbsolutePosition($(this).get(0)).y;
            
		    var bigimage = $(this).attr("alt");
                noalt = $(this).attr("alt");
                $(this).attr("alt",'');
                

		    if($("div.zoomdiv").get().length == 0)
            {
		      $(this).after("<div class='zoomdiv'><img class='bigimg' src='"+bigimage+"'/></div>");
		    }

		    if(settings.position == "right")
            {
		      leftpos = imageLeft + imageWidth + settings.offset;
		    }
            else
            {
		      leftpos = imageLeft - settings.xzoom - settings.offset;
		    }

		    $("div.zoomdiv").css({ top: imageTop,left: leftpos });
		    $("div.zoomdiv").width(settings.xzoom);
		    $("div.zoomdiv").height(settings.yzoom);
		    $("div.zoomdiv").show();

					$(document.body).mousemove(function(e)
                    {

    				    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 = Math.round(bigwidth/imageWidth) ;
        				    var scaley = Math.round(bigheight/imageHeight);
    				    }
    
    					mouse = new MouseEvent(e);
                        
                        //imageLeft = getAbsolutePosition($("img.jqzoom").get(0));
                        //imageTop = getAbsolutePosition($("img.jqzoom").get(0));    
                        
    					scrolly = mouse.y - imageTop - ($("div.zoomdiv").height()*1/scaley)/2 ;
    					$("div.zoomdiv").get(0).scrollTop = scrolly * scaley;
    				    scrollx =    mouse.x - imageLeft - ($("div.zoomdiv").width()*1/scalex)/2;
    					$("div.zoomdiv").get(0).scrollLeft = (scrollx) * scalex;
                        
                        /*$("#debug").html(
                        "scalex:"+scalex+
                        "|scaley:"+scaley+
                        "|scrollx:"+scrollx+
                        "|scrolly:"+scrolly+
                        "|mouse.x:"+mouse.x+
                        "|mouse.y:"+mouse.y+
                        "|div.zoomdiv.height:"+$("div.zoomdiv").height()+
                        "|div.zoomdiv.width:"+$("div.zoomdiv").width()+
                        "|imageTop:"+imageTop+
                        "|imageLeft:"+imageLeft+
                        "<br>");*/

				    });
		    },function()
            {
                $(this).attr("alt",noalt);
                $("div.zoomdiv").hide();
                $(document.body).unbind("mousemove");
                $(".lenszoom").remove();
                $("div.zoomdiv").remove();
		    });

		}

})(jQuery);

function MouseEvent(e) 
{
    this.x = e.pageX
    this.y = e.pageY
}

function getAbsolutePosition(element) 
{
    var r = { x: element.offsetLeft, y: element.offsetTop };
    if (element.offsetParent) {
        var tmp = getAbsolutePosition(element.offsetParent);
        r.x += tmp.x;
        r.y += tmp.y;
    }
    return r;
};