function show_hide(obj) {
	if ($(obj)) {
		
		if ($(obj).style.display=="none") $(obj).style.display="block";
		else $(obj).style.display="none";
		
		}
	}
	
function hide_obj(obj) {
	if ($(obj)) $(obj).style.display="none";

	}
	
function setCookie(key, value, days, path, domain, secure) {
   value = encodeURIComponent(value); // hodnota value by měla být minimálně escapována pomocí funkce escape()
   value+='; domain='+domain;
   value+='; path='+path;
   
   // expirace
   var date = new Date();
   date.setTime(date.getTime() + days * 24 * 60 * 60 * 1000);
   value+='; expires=' + date.toGMTString();
   
   // secure
  if (secure) value+='; secure';
  document.cookie = key + '=' + value;
}

function msg_test(txt) {
	
	$("Modal_oddelovac").update(txt);
	$("Modal_oddelovac").setStyle({
		padding: '10px',
		backgroundColor: '#FF9900'
	});
	
}

function test_msg(obj,txt) {
	
		$(obj).update(txt);
		$(obj).setStyle({
		padding: '10px'
	});
}

function test_hledej() {
	
	if ($("search").value.length<3) alert ("Pro vyhledávání je nutné zadat minimálně 3 znaky !");
	else $("find_frm").submit();
	
	return false;
	
	
	}


function newloc(url) {
	
	document.location=url;
	
}

var my_anim=false;
function myevent() {
	if ($('kategorie')) {
		Event.observe($('kategorie_menu'), 'mouseover', function(event) {
		 	
			my_anim="OUT"
			
		});
		Event.observe($('kategorie_menu'), 'mouseout', function(event) {
			my_anim="IN"
		});
		
		new PeriodicalExecuter(function(pe) {
		  animate();
		}, .05);

		
	}
}
	

function animate() {
	
	if (my_anim=='OUT') {
	
		var test=$('kategorie_menu').positionedOffset();
		x=test.left;
		if (x>0) x=Math.ceil(x/2)
		if (x<1) x=0
		$('kategorie_menu').setStyle({
		   left: x + "px"
		})
	}
	if (my_anim=='IN') {
		var test=$('kategorie_menu').positionedOffset();
		x=test.left;
		if (x<358) x=x+Math.ceil((358-x)/2)
		if (x>357) x=358
		$('kategorie_menu').setStyle({
		   left: x + "px"
		})
	}
}



function modal_msg(txt,tl){
	
	if (!txt.blank()) $("modal_msg_text").update(txt);
	
	dimension=$("modal_msg").getDimensions();
	
	
	var x=(document.viewport.getWidth()-dimension.width)/2+document.viewport.getScrollOffsets().left +"px";
	var y=(document.viewport.getHeight()-dimension.height)/2+document.viewport.getScrollOffsets().top+"px";
	
	
	$('modal_msg').setStyle({
		  top: y,
		  left: x
		})
	
	$('modal_msg').show();
	
	}