//**************************************************************
// 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: 200,			//zoomed width default width
				yzoom: 200,			//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 imageRelativeLeft = $(this).get(0).offsetLeft;
				var imageLeft = $($(this).get(0)).offset().left;
				var imageRelativeTop =  $(this).get(0).offsetTop;
				var imageTop = $($(this).get(0)).offset().top;
				var imageWidth = $(this).get(0).offsetWidth;
				var imageHeight = $(this).get(0).offsetHeight;

				noalt = $(this).attr("alt");
				var bigimage = noalt;
				$(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 = imageRelativeLeft + imageWidth + settings.offset;
				else
					leftpos = imageRelativeLeft - settings.xzoom - settings.offset;

				$("div.zoomdiv").css({top: imageRelativeTop,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);

					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 ;
				});
			}, 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
}
