var img_def = 'uvod';

function show_img(img_name){
	var img = document.getElementById('h_menu_img');
	var new_img = document.getElementById('img_' + img_name);
	img.src = new_img.src;
}

function show_default(){
	show_img(img_def);
}

function set_default(img){
	img_def = img;
	show_default();
}

function clearSearch(){
	var search = document.getElementById('search_in');
	search.value = '';
}

function fillSearch(){
	var search = document.getElementById('search_in');
	if(search.value == ''){
		search.value= '... hledej ...';
	}
}