/**
	 * Interface Elements for jQuery
	 * FX - scroll to
	 *
	 * http://interface.eyecon.ro
	 *
	 * Copyright (c) 2006 Stefan Petre
	 * Dual licensed under the MIT (MIT-LICENSE.txt)
	 * and GPL (GPL-LICENSE.txt) licenses.
	 *   
	 *
	 */
	/**
	 * Applies a scrolling effect to document until the element gets into viewport
	 */
	jQuery.fn.extend (
	    {
	        /**
	         * @name ScrollTo
	         * @description scrolls the document until the lement gets into viewport
	         * @param Mixed speed animation speed, integer for miliseconds, string ['slow' | 'normal' | 'fast']
	         * @param String axis (optional) whatever to scroll on vertical, horizontal or both axis ['vertical'|'horizontal'|null]
	         * @param String easing (optional) The name of the easing effect that you want to use.
	         * @type jQuery
	         * @cat Plugins/Interface
	         * @author Stefan Petre
	         */
	        ScrollTo : function(speed, axis, easing) {
	            o = jQuery.speed(speed);
	            return this.queue('interfaceFX',function(){
	                new jQuery.fx.ScrollTo(this, o, axis, easing);
	            });
	        },
	        /**
	         * @name ScrollToAnchors
	         * @description all links to '#elementId' will animate scroll
	         * @param Mixed speed animation speed, integer for miliseconds, string ['slow' | 'normal' | 'fast']
	         * @param String axis (optional) whatever to scroll on vertical, horizontal or both axis ['vertical'|'horizontal'|null]
	         * @param String easing (optional) The name of the easing effect that you want to use.
	         * @type jQuery
	         * @cat Plugins/Interface
	         * @author Stefan Petre
	         */
	        /*inspired by David Maciejewski www.macx.de*/
	        ScrollToAnchors : function(speed, axis, easing) {
	            return this.each(
	                function()
	                {
	                    jQuery('a[@href*="#"]', this).click(
	                        function(e)
	                        {
	                            parts = this.href.split('#');
	                            jQuery('#' + parts[1]).ScrollTo(speed, axis, easing);
	                            return false;
	                        }
	                    );
	                }
	            )
	        }
	    }
	);
	
	jQuery.fx.ScrollTo = function (e, o, axis, easing)
	{
	    var z = this;
	    z.o = o;
	    z.e = e;
	    z.axis = /vertical|horizontal/.test(axis) ? axis : false;
	    z.easing = easing;
	    p = jQuery.iUtil.getPosition(e);
	    s = jQuery.iUtil.getScroll();
	    z.clear = function(){clearInterval(z.timer);z.timer=null;jQuery.dequeue(z.e, 'interfaceFX');};
	    z.t=(new Date).getTime();
	    s.h = s.h > s.ih ? (s.h - s.ih) : s.h;
	    s.w = s.w > s.iw ? (s.w - s.iw) : s.w;
	    z.endTop = p.y > s.h ? s.h : p.y;
	    z.endLeft = p.x > s.w ? s.w : p.x;
	    z.startTop = s.t;
	    z.startLeft = s.l;
	    z.step = function(){
	        var t = (new Date).getTime();
	        var n = t - z.t;
	        var p = n / z.o.duration;
	        if (t >= z.o.duration+z.t) {
	            z.clear();
	            setTimeout(function(){z.scroll(z.endTop, z.endLeft)},13);
	        } else {
	            if (!z.axis || z.axis == 'vertical') {
	                if (!jQuery.easing || !jQuery.easing[z.easing]) {
	                    st = ((-Math.cos(p*Math.PI)/2) + 0.5) * (z.endTop-z.startTop) + z.startTop;
	                } else {
	                    st = jQuery.easing[z.easing](p, n, z.startTop, (z.endTop - z.startTop), z.o.duration);
	                }
	            } else {
	                st = z.startTop;
	            }
	            if (!z.axis || z.axis == 'horizontal') {
	                if (!jQuery.easing || !jQuery.easing[z.easing]) {
	                    sl = ((-Math.cos(p*Math.PI)/2) + 0.5) * (z.endLeft-z.startLeft) + z.startLeft;
	                } else {
	                    sl = jQuery.easing[z.easing](p, n, z.startLeft, (z.endLeft - z.startLeft), z.o.duration);
	                }
	            } else {
	                sl = z.startLeft;
	            }
	            z.scroll(st, sl);
	        }
	    };
	    z.scroll = function (t, l){window.scrollTo(l, t);};
	    z.timer=setInterval(function(){z.step();},13);
	};