//**************************************************************
// jQZoom allows you to realize a small magnifier window,close
// to the image or images on your web page easily.
//
// jqZoom version 2.0
// Author Doc. Ing. Renzi Marco(www.mind-projects.it)
// First Release 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
				preload: 1,
				smallTop: 0,
				smallLeft: 0
			};

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

		    var noalt = '';

		    $(this).hover(function(){

    		    var imageLeft = this.offsetLeft;
	    	    var imageRight = this.offsetRight;
		        var imageTop =  $(this).get(0).offsetTop;
		        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)
		        {
        		    $(this).after("<div class='zoomdiv'><img class='bigimg' src='"+bigimage+"'/></div>");
    
	        	    $(this).append("<div class='jqZoomPup'>&nbsp;</div>");
    		    }

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

                if (settings.smallTop != 0 && settings.smallLeft != 0)
                {
                    $("div.zoomdiv").css({ top: imageTop - settings.smallTop, left: leftpos - settings.smallLeft });
                }
		        else
		        {
		            $("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){

                    $("div.jqZoomPup").hide();

    			    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);

                         $('div.jqZoomPup').show();
    
                         $("div.jqZoomPup").css('visibility','visible');
                    }

			    	mouse = new MouseEvent(e);

                    xpos = mouse.x - $("div.jqZoomPup").width()/2 - imageLeft;
                    ypos = mouse.y - $("div.jqZoomPup").height()/2 - imageTop ;

                    xpos = (mouse.x - $("div.jqZoomPup").width()/2 < imageLeft ) ? 0 : (mouse.x + $("div.jqZoomPup").width()/2 > imageWidth + imageLeft ) ?  (imageWidth -$("div.jqZoomPup").width() -2)  : xpos;
					ypos = (mouse.y - $("div.jqZoomPup").height()/2 < imageTop ) ? 0 : (mouse.y + $("div.jqZoomPup").height()/2  > imageHeight + imageTop ) ?  (imageHeight - $("div.jqZoomPup").height() -2 ) : ypos;

                    $("div.jqZoomPup").css({ top: ypos,left: xpos });

                    $("div.jqZoomPup").show();

                    //scrolly = mouse.y - imageTop - ($("div.zoomdiv").height()*1/scaley)/2 ;

					scrolly = ypos;

					$("div.zoomdiv").get(0).scrollTop = scrolly * scaley;

					scrollx = xpos;

				    //scrollx =    mouse.x - imageLeft - ($("div.zoomdiv").width()*1/scalex)/2 ;

					$("div.zoomdiv").get(0).scrollLeft = (scrollx) * scalex ;
                    
				    });
		    },function(){

               $(this).children("img").attr("alt",noalt);
		       $(document.body).unbind("mousemove");
		       $("div.jqZoomPup").remove();
		       $("div.zoomdiv").remove();

		    });

            count=0;

		if(settings.preload){

		$('body').append("<div style='display:none;' class='jqPreload"+count+"'>loading...</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
}