// resolve parameters
// accepted - position
var path = location.href.substring(0, location.href.indexOf("?") - 1);
var params = location.href.substring(location.href.indexOf("?") + 1, location.href.length);
var params_arr = params.split("&");
// process params
var position = 0;
for(i=0; i < params_arr.length; i++)
{
        var param_arr = params_arr[i].split("=");
	if(param_arr[0]=="position")
	{
		try
		{
			position = parseInt(decodeURIComponent(param_arr[1]));
		}
		catch(e)
		{
		}
		break;
	}
}
if(position >= pictures.length || position < 0) position = 0; 

var imgCode = '<img src="img/' + pictures[position][0] + '" alt="' + pictures[position][1] + ' - ' + pictures[position][2] + '"/>';

var descriptionCode = pictures[position][1] + '<br/>' + pictures[position][2] + '<br/>' + pictures[position][3];

var previousNavigatorCode = "";
if(position > 0)
{
	previousNavigatorCode = '<a href="index.html?position=' + (position - 1) + '">předchozí</a>';
}

var nextNavigatorCode = "";
if(position + 1 < pictures.length)
{
	nextNavigatorCode = '<a href="index.html?position=' + (position + 1) + '">další</a>';
}