(function($) {
  
    $.anythingZoomer = {
    
        defaults: {
            smallArea: "#small",
            largeArea: "#large",
            zoomPort: "#overlay",
            mover: "#mover",
            expansionSize: 30,
            speedMultiplier: 1.5
            
        }
            
    }
    
    $.fn.extend({
        anythingZoomer:function(config) {
        
            var config = $.extend({}, $.anythingZoomer.defaults, config); 
            
            var wrap = $(this);
        
            var smallArea = $(config.smallArea);
            var largeArea = $(config.largeArea);
            var zoomPort = $(config.zoomPort);
            var mover = $(config.mover);
            
            var expansionSize = config.expansionSize;
            var speedMultiplier = config.speedMultiplier;
			
			var over = false;
            
            function setup(smallArea, largeArea, wrap, zoomPort, mover, expansionSize, speedMultiplier) {
            
                smallArea
                    .show();
                    
                zoomPort
                    .fadeIn();
                    
                mover
                    .css({
                        width: mover.data("origWidth"),
                        height: mover.data("origHeight"),
                        overflow: "hidden",
                        position: "absolute"
                    })

                wrap
                    .css({
                        //width: "auto"
                    })
            		.mousemove(function(e){
            			var x = e.pageX - smallArea.offset().left;
            			var y = e.pageY - smallArea.offset().top;
            			
            			if ( (x < -expansionSize) || (x > smallArea.width() + expansionSize) || (y < -expansionSize) || (y > smallArea.height() + expansionSize) ) {
							if(over)
							{
								mover.fadeOut(50);
								over = false;
							}
							return;
            			}
						else
						{
							if(!over)
							{
								mover.fadeIn();
								over = true;
							}
						}
            							
            			mover.css({
            				top: y - 50,
            				left: x - 50
            			});
            			
            			largeArea.css({
            			
            			    left: (-(e.pageX - smallArea.offset().left)*speedMultiplier)+expansionSize,
            			    top: (-(e.pageY - smallArea.offset().top)*speedMultiplier)+expansionSize
            			
            			});
            			
            		})
            		.dblclick(function() {
            		
                        expand(smallArea, largeArea, wrap, zoomPort, mover, expansionSize, speedMultiplier);
            
            		});
            
            };
            
            function expand(smallArea, largeArea, wrap, zoomPort, mover, expansionSize, speedMultiplier) {
            
                  smallArea
        		      .hide(); 
        		      
        		  zoomPort
        		      .hide();       		      
        		  
        		  mover
        		      .fadeIn()
        		      .data("origWidth", mover.width())
        		      .data("origHeight", mover.height())
        		      .css({
        		          position: "static",
        		          height: "auto",
        		          width: "auto",
        			      overflow: "visible"
        		      });
        		      
        		  wrap
        		      .css({
        		          width: "100%"
        		      })
        		      .unbind()
        		      .dblclick(function(){
        		          setup(smallArea, largeArea, wrap, zoomPort, mover, expansionSize, speedMultiplier);
        		      });
        		      
        		      
        		  largeArea   
        		      .css({
        		          left: 0,
        		          top: 0,
        		          width: largeArea.data("origWidth")
        		      });
        		              
            };
            
            mover
		      .data("origWidth", mover.width())
		      .data("origHeight", mover.height());
		    
		    // Because the largeArea is often hidden, the width() function returns zero, take width from CSS instead  
		    largeArea
		      .data("origWidth", largeArea.css("width"));

            setup(smallArea, largeArea, wrap, zoomPort, mover, expansionSize, speedMultiplier);
        
            return this;
        
        }
        
    });
  
})(jQuery);