// JavaScript Document
var pos;
var poziceX = 0;
var rychlost = 5;
var pozdrav;
var i=0;
var time=1;

$(function() {
	initKrok();
});

function initKrok() {
	poziceX = readCookie(window.location);
	krok(0);
	
}



function start(stav) {
    	if (stav == 1) pozdrav = window.setInterval("krok(0)", 30);
	if (stav == 2) pozdrav = window.setInterval("krok(1)", 30);
	if (stav == 0) window.clearInterval(pozdrav);
}
			    
function krok(smer){		
	element = document.getElementById("posuv");
	if(element != null) {
		if (smer==1 && poziceX < 0) {
			poziceX += rychlost;
			i=0;
		}
		else if ( smer==0 && i <= 0 ) {
			poziceX -= rychlost;
			if(element.scrollHeight <= 310 ) {
				i++;
			}
		}
		element.style.left = poziceX + "px";

		createCookie(window.location,poziceX,time);
	}
	
}

function createCookie(name,value,days) {
	if (days) {
		var date = new Date();
		date.setTime(date.getTime()+(days*24*60*60*1000));
		var expires = "; expires="+date.toGMTString();
	}
	else var expires = "";
	document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for(var i=0;i < ca.length;i++) {
		var c = ca[i];
		while (c.charAt(0)==' ') c = c.substring(1,c.length);
		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
	}
	return null;
}

function eraseCookie(name) {
	createCookie(name,"",-1);
}