function hide_all_imgs()
{
var vsetky_idy = new Array ("det_01", "det_02", "det_03", "det_04", "det_05", "det_06", "det_07", "det_08", "det_09")
	for(var i=0; i<vsetky_idy.length; i++)
	{
		var act=document.getElementById(vsetky_idy[i]);
		act.style.display="none";
	}
}

function show_pic(kto1){

hide_all_imgs()

document.getElementById(kto1).style.display = 'block';
}

function show_bg(src){
document.getElementById('menu_img').style.background = src
document.getElementById('menu_img').style.backgroundRepeat = 'no-repeat'
}

function show_hide_span(ide,disp){
document.getElementById(ide).style.display = disp
document.getElementById('ponuka-zoznam').style.display = 'none'
}

function show_zoznam(idoff){
document.getElementById('ponuka-zoznam').style.display = 'block'
document.getElementById(idoff).style.display = 'none'
}