//**************************************************************
// jQZoom allows you to realize a small magnifier window,close
// to the image or images on your web page easily.
//
// jqZoom version 2.2
// Author Doc. Ing. Renzi Marco(www.mind-projects.it)
// First Release on Dec 05 2007
// i'm looking 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: 19,		//zoomed div default offset
				position: "right" ,//zoomed div default position,offset position is to the right of the image
				lens:1, //zooming lens over the image,by default is 1;
				preload: 1,
				always:0, // always view zoomed div 0 , 1, 2
				popupurl:""

			};

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

		    var noalt='';
			var imageLeft;
			var imageTop;
			var imageWidth;
			var imageHeight;

			function zoomshow(obj) {
				imageLeft = $(obj).offset().left;                
				imageTop = $(obj).offset().top;
				   
				imageWidth = $(obj).children('img').get(0).offsetWidth;
				imageHeight = $(obj).children('img').get(0).offsetHeight;

				noalt= $(obj).children("img").attr("alt");

				var bigimage = $(obj).children("img").attr("jqimg");

				$(obj).children("img").attr("alt",'');

				if($("div.zoomdiv").get().length == 0){

				$(obj).after("<div class='zoomdiv'><img class='bigimg' src='"+bigimage+"'/></div>");


				$(obj).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 + imageWidth + settings.offset;
						 if($.browser.mozilla) {
							 leftpos += 8;
						 }
					}
				}else{
					leftpos = imageLeft - settings.xzoom - settings.offset;
					if(leftpos < 0){
						 leftpos = imageLeft + imageWidth  + settings.offset;
					}
				}
				
				var toppos;

				if($("div.jq_zoom_pos")) {
					toppos = $("div.jq_zoom_pos").offset().top;
				} else {
					toppos = imageTop;
				}

				if($(window).scrollTop() > toppos + 10) {
					toppos = $(window).scrollTop() + 10;				
				} 

				$("div.zoomdiv").css({ top: toppos, left: leftpos });
			
				$("div.zoomdiv").width(settings.xzoom);

				$("div.zoomdiv").height(settings.yzoom);

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

				if(settings.always == 1 ) $("div.zoomdiv img").hide();
			}
		
			if(settings.always) zoomshow(this);			

			$(this).click(function() { 
				var bigimage = $(this).children("img").attr("jqimg");
				jq_openPopup(settings.popupurl + "?image=" + bigimage,1024,768);
			});

		    $(this).hover(function(){
                
				zoomshow(this);

						if(!settings.lens){   	
						  $(this).css('cursor','crosshair');
						} else {
							$("div.jqZoomPup").show();
						}

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

					   mouse = new MouseEvent(e);

					   /*$("div.jqZoomPup").hide();*/
						
						if(settings.always == 1) {
							$("div.zoomdiv img").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 ) ? 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;

						}


						if(settings.lens){

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

						}



						scrolly = ypos;

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

						scrollx = xpos;

						$("div.zoomdiv").get(0).scrollLeft = (scrollx) * scalex ;


						});
				},function(){

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

				   if(settings.lens){
					   if(!settings.always) {
						   $("div.zoomdiv").remove();
						   $("div.jqZoomPup").remove();
					   } else if(settings.always == 1) {						    
						   $("div.zoomdiv img").hide();
						   $("div.jqZoomPup").hide();
					   }
				   }
		    });

        count = 0;

		if(settings.preload){

		$('body').append("<div style='display:none;' class='jqPreload"+count+"'>&nbsp;</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;
}
	
function jq_openPopup(url,width,height) {	
	 var sw=screen.width;
	 var sh=screen.height;

	 var px=(sw-width)/2;
	 var py=(sh-height)/2;


	window.open(url,'_blank',"width=" + width + ",height=" + height + ",top=" + py + ",left=" + px + ",scrollbars=yes" ); 
}

var jq_zoomIntervalID = 0;
function jq_zoomup(toppos) {
	if($("div.zoomdiv") && $("div.zoomdiv").offset()) {
		if(toppos != $("div.zoomdiv").offset().top) {
			if(jq_zoomIntervalID) {
				clearInterval(jq_zoomIntervalID);
				jq_zoomIntervalID = 0;
			}

			jq_zoomIntervalID = setInterval(function() {
				var nt = $("div.zoomdiv").offset().top;
				nt += 0.09 * ( toppos - nt );
				var tt = Math.round( nt );
				$("div.zoomdiv").css( {top: tt} );

				if(tt == toppos) {
					clearInterval(jq_zoomIntervalID);
					jq_zoomIntervalID = 0;
				}
			}, 10);
		}
	}
}

setInterval(function() {
	if($(".jqzoom")) {
		var toppos;
		
		if($("div.jq_zoom_pos") && $("div.jq_zoom_pos").offset()) {
			toppos= $("div.jq_zoom_pos").offset().top;
		} else {
			toppos= $(".jqzoom").offset().top + 10;
		}
		var n_toppos = toppos;

		if($(window).scrollTop() > toppos + 10) {
			n_toppos = $(window).scrollTop() + 10;				
		} 

		jq_zoomup(n_toppos);
	
	}
}, 200);