$.fn.getHiddenDimensions = function(includeMargin) {
    	    var $item = this,
    	        props = { position: 'absolute', visibility: 'hidden', display: 'block' },
    	        dim = { width:0, height:0, innerWidth: 0, innerHeight: 0,outerWidth: 0,outerHeight: 0 },
    	        $hiddenParents = $item.parents().andSelf().not(':visible'),
    	        includeMargin = (includeMargin == null)? false : includeMargin;
    	 
    	    var oldProps = [];
    	    $hiddenParents.each(function() {
    	        var old = {};
    	 
    	        for ( var name in props ) {
    	            old[ name ] = this.style[ name ];
    	            this.style[ name ] = props[ name ];
    	        }
    	 
    	        oldProps.push(old);
    	    });
    	 
    	    dim.width = $item.width();
    	    dim.outerWidth = $item.outerWidth(includeMargin);
    	    dim.innerWidth = $item.innerWidth();
    	    dim.height = $item.height();
    	    dim.innerHeight = $item.innerHeight();
    	    dim.outerHeight = $item.outerHeight(includeMargin);
    	 
    	    $hiddenParents.each(function(i) {
    	        var old = oldProps[i];
    	        for ( var name in props ) {
    	            this.style[ name ] = old[ name ];
    	        }
    	    });
    	 
    	    return dim;
    	};