/*
 * jScroller 0.3 - Scroller Script
 *
 * Copyright (c) 2007 Markus Bordihn (http://markusbordihn.de)
 * Dual licensed under the MIT (MIT-LICENSE.txt)
 * and GPL (GPL-LICENSE.txt) licenses.
 *
 * $Date: 2007-11-14 23:00:00 +0100 (Wed, 14 Nov 2007) $
 * $Rev: 0.3 $
 *
 * Modified by David Prem (http://www.kaoh.at)
 */
  
$(document).ready(function(){
	this.defaults = {
		scroller: {
			interval:     0,      // Dont touch !
			refresh:      50,     // Refresh Time in ms
			direction:    "down", // down,right,left,up
			speed:        1,      // Set the Scroller Speed
			id:           "#scroller",
			cont_id:      "#scroller_container"
		}
	}
  
	var jscroller_config = $.extend(this.defaults), jscroller_scroller = $(jscroller_config.scroller.id), jscroller_scroller_cont = $(jscroller_config.scroller.cont_id);

	if (jscroller_scroller && jscroller_scroller_cont) {
		jscroller_scroller.css({position: 'absolute', left: 0, top: 0});
		jscroller_init();
	}

	function jscroller_startScroll() {
		if(!jscroller_config.scroller.interval) {
			jscroller_config.scroller.interval=window.setInterval(jscroller_doScroll,jscroller_config.scroller.refresh);
		}
	}
   
	/*function jscroller_stopScroll() {
		if (jscroller_config.scroller.interval) {
		window.clearInterval(jscroller_config.scroller.interval);
		jscroller_config.scroller.interval=0;
		}
	};*/

	function jscroller_init() {
		jscroller_scroller_cont.css('overflow','hidden');
		if(!jscroller_config.scroller.interval) { 
			if (window.attachEvent) {
				window.attachEvent("onfocus", jscroller_startScroll);
				/*window.attachEvent("onblur",  jscroller_stopScroll);*/
				window.attachEvent("onresize", jscroller_startScroll);
				window.attachEvent("onscroll", jscroller_startScroll);
			}
			else if (window.addEventListener) {
				window.addEventListener("focus", jscroller_startScroll, false);
				/*window.addEventListener("blur",  jscroller_stopScroll, false);*/
				window.addEventListener("resize", jscroller_startScroll, false);
				window.addEventListener("scroll", jscroller_startScroll, false);
			}  
			jscroller_startScroll();
			if ($.browser.msie) {window.focus()}
		}
	}

	function jscroller_getElem(Elem) {
		return (typeof Elem == "string" && document.getElementById)? document.getElementById(Elem) : Elem;
	}

	function jscroller_doScroll() {
		var 
			scroller_dom = jscroller_getElem(jscroller_scroller.attr("id")),
			p_top= Number((/[0-9-,.]+/.exec(jscroller_scroller.css('top'))||0)),
			p_left=Number((/[0-9-,.]+/.exec(jscroller_scroller.css('left'))||0)),
			min_height=jscroller_scroller_cont.height(),
			min_width=jscroller_scroller_cont.width(),
			speed=jscroller_config.scroller.speed,
			p_height=scroller_dom.offsetHeight,
			p_width=scroller_dom.offsetWidth,
			direction=jscroller_config.scroller.direction,
			jscroller=jscroller_scroller;

		switch(direction) {
			case 'up':
				if (p_top > -1*(p_height-min_height))
					jscroller.css('top',p_top-speed+'px');
				else
					jscroller.css('top',(-1*(p_height-min_height))+'px');
				break;
			case 'right':
				if (p_left >= min_width) {p_left=-1*width;}
					jscroller.css('left',p_left+speed+'px');
				break;
			case 'left':
				if (p_left <= -1*p_width) {p_left=min_width;}
					jscroller.css('left',p_left-speed+'px');
				break;
			case 'down':
				/*if (p_top >= min_height) {p_top=-1*p_height;}*/
				if (p_top <= -1*speed)
					jscroller.css('top',p_top+speed+'px');
				else
					jscroller.css('top','0px');
				break;
		}
	}
});