var ns =  0 ;

var start = new Date();

ns =  (document.layers) ? 1 : 0;
var ie = (document.all) ? 1 : 0;
var ns6= (!document.all && document.getElementById) ? 1 : 0;

function showLayer(id) {
    if(ie) { document.all[id].style.visibility = 'visible';}
    else if (ns) { document.layers[id].visibility = 'visible';}
    else if(ns6) {document.getElementById(id).style.visibility = 'visible';}
    
    document.getElementById(id).style.display = 'block';
}
																																																																		      
function hideLayer(id) {
    if(ie) { document.all[id].style.visibility = 'hidden';}
    else if (ns) { document.layers[id].visibility = 'hide';}
    else if(ns6) {document.getElementById(id).style.visibility = 'hidden';}
    document.getElementById(id).style.display = 'none';
}
    
function showVoivodship(id) {
	
	hideLayer('dolnoslaskie');
	hideLayer('kujawsko_pomorskie');
	hideLayer('lubelskie');
	hideLayer('lubuskie');
	hideLayer('lodzkie');
	hideLayer('malopolskie');
	hideLayer('mazowieckie');
	hideLayer('opolskie');
	hideLayer('podkarpackie');
	hideLayer('podlaskie');
	hideLayer('pomorskie');
	hideLayer('slaskie');
	hideLayer('swietokrzyskie');
	hideLayer('warminsko_mazurskie');
	hideLayer('wielkopolskie');
	hideLayer('zachodniopomorskie');
	
	showLayer(id);
}

function selectOption(selectInputId, optionIndex) {
	var selectObject = document.getElementById(selectInputId);
	selectObject.selectedIndex = optionIndex;
	hideLayer('map_selector_toplayer_base');
}