/* Horizontal Tiny Scrolling - a smooth scrolling script for horizontal websites
(the brother of the vertical "Tiny Scrolling")
by Marco Rosella - http://www.centralscrutinizer.it/en/design/js-php/horizontal-tiny-scrolling
                v0.6 - February 14, 2007
				
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

===========
Pause scrolling function – modification developed by Petr Janecek, 04/2008
===========
*/

window.onload = function() {
	HtinyScrolling.init(); scrollTips.init();
	}

var HtinyScrolling = {
	speed : 1,		//set here the scroll speed: when this value increase, the speed decrease. 
	maxStep: 1,		//set here the "uniform motion" step for long distances
	brakeK: 1,		//set here the coefficient of slowing down
	hash:null,		
	currentBlock:null,
	requestedX:0,
	init: function() {
		var lnks = document.getElementsByTagName('a');   
		for(var i = 0, lnk; lnk = lnks[i]; i++) {   
			if ((lnk.href && lnk.href.indexOf('#') != -1) &&  ( (lnk.pathname == location.pathname) ||
			('/'+lnk.pathname == location.pathname) ) && (lnk.search == location.search)) {  
			addEvent(lnk,'click',HtinyScrolling.initScroll,false);
			lnk.onclick=function(){return false;} // Safari
			}   
		}    
	},
	getTarget: function(target) {
		while(target.tagName.toLowerCase() != 'a')
			target = target.parentNode;
		return target;
	},
	getElementXpos: function(el){
		var x = 0;
		while(el.offsetParent){  
			x += el.offsetLeft;    
			el = el.offsetParent;
		}	return x;
	},		
	getScrollLeft: function(){
		if(document.all) return (document.documentElement.scrollLeft) ? document.documentElement.scrollLeft : document.body.scrollLeft;
		else return window.pageXOffset;   
	},	
	getWindowWidth: function(){
		if (window.innerWidth)	return window.innerWidth; 
		if(document.documentElement && document.documentElement.clientWidth) return document.documentElement.clientWidth;
	},
	getDocumentWidth: function(){
		if (document.width) return document.width;
		if(document.body.offsetWidth) return document.body.offsetWidth;
	},
	
	// Pause scrolling function, part1, begin
	initScroll: function(e){
		var targ;
		if (!e) var e = window.event;
		if (e.target) targ = e.target;
		else if (e.srcElement) targ = e.srcElement; targ = HtinyScrolling.getTarget(targ);  //a fix by Skid X
		if(HtinyScrolling.hash != targ.href.substr(targ.href.indexOf('#')+1,targ.href.length)){
			HtinyScrolling.hash = targ.href.substr(targ.href.indexOf('#')+1,targ.href.length);
			HtinyScrolling.currentBlock = document.getElementById(HtinyScrolling.hash);
			if(!HtinyScrolling.currentBlock) return;
				HtinyScrolling.requestedX = HtinyScrolling.getElementXpos(HtinyScrolling.currentBlock);
				clearTimeout(HtinyScrolling.ScrollerTimer);
				HtinyScrolling.scroll(targ);
			return false;
			}
		},      stopScroll: function(){
		clearTimeout(HtinyScrolling.ScrollerTimer);
		HtinyScrolling.hash = null;
	},
	// Pause scrolling function, part1, end
   
	scroll: function(targ){
		var left  = HtinyScrolling.getScrollLeft();
		if(HtinyScrolling.requestedX > left) { 
			var endDistance = Math.round((HtinyScrolling.getDocumentWidth() - (left + HtinyScrolling.getWindowWidth())) / HtinyScrolling.brakeK);
			endDistance = Math.min(Math.round((HtinyScrolling.requestedX-left)/ HtinyScrolling.brakeK), endDistance);
			var offset = Math.max(2, Math.min(endDistance, HtinyScrolling.maxStep));
		} else { var offset = - Math.min(Math.abs(Math.round((HtinyScrolling.requestedX-left)/ HtinyScrolling.brakeK)), HtinyScrolling.maxStep);
		} window.scrollTo(left + offset, 0);  
		if(Math.abs(left-HtinyScrolling.requestedX) <= 2 || HtinyScrolling.getScrollLeft() == left) {
			window.scrollTo(HtinyScrolling.requestedX, 0);
			if(typeof XULDocument != 'undefined') {
				if(HtinyScrolling.hash != null){
					window.location.hash = "#"+HtinyScrolling.hash;
				}
			}
			//optional instructions: you can add an effect to enlight after the scroll the selected section.
			//uncomment this line below if you want to change the opacity:
			//mark.change_opacity(HtinyScrolling.hash);
			
			//you can also call the function "mark.change_colors(HtinyScrolling.hash, fps, (duration in sec), #(color in hex), #(color in hex))" to change background color of selected section   
			//HtinyScrolling.hash = null;
			
		// Pause scrolling function, part2, begin
		} else HtinyScrolling.ScrollerTimer = setTimeout(HtinyScrolling.scroll,HtinyScrolling.speed);
		// Pause scrolling function, part2, end
	}
}

/* the mouse scrolling doesn't work with Opera, that hasn't a event associated to the mouse wheel */
 
var scrollTips = {
	dx : null,
	init : function() {	
		if (window.addEventListener) {
		window.addEventListener("DOMMouseScroll", this.mouseScroll, false);
		} else document.attachEvent("onmousewheel", this.mouseScroll); 
		var left = document.getElementById('scrollLeft');
		addEvent(left,'mouseover', function() {this.dx=setInterval('scrollTips.arrowScroll(0)',100);return false;});
		addEvent(left,'mouseout', function() { clearInterval(this.dx); return false;});
		var right = document.getElementById('scrollRight');
		addEvent(right,'mouseover', function() {this.dx=setInterval('scrollTips.arrowScroll(1)',100);return false;});
		addEvent(right,'mouseout', function() { clearInterval(this.dx); return false;});
	},
	mouseScroll : function(e) {
		if (!e) var e = window.event;
		if (e.wheelDelta <= 0 || e.detail>=0){  
		window.scrollBy(80,0);
		} else  window.scrollBy(-80,0) ; 
	},	
	arrowScroll: function(val) {
		if(val==1) {
			window.scrollBy(70,0);
		} else {
			window.scrollBy(-70,0)
		}
	}
}

/* the color changes have been deleted */

function addEvent( obj, type, fn ) {
	if (obj.addEventListener)
		obj.addEventListener( type, fn, false );
	else if (obj.attachEvent) {
		obj["e"+type+fn] = fn;
		obj[type+fn] = function() { obj["e"+type+fn]( window.event ); }
		obj.attachEvent( "on"+type, obj[type+fn] );
	}
}

function removeEvent( obj, type, fn ) {
	if (obj.removeEventListener)
		obj.removeEventListener( type, fn, false );
	else if (obj.detachEvent) {
		obj.detachEvent( "on"+type, obj[type+fn] );
		obj[type+fn] = null;
		obj["e"+type+fn] = null;
	}
}