function zmen(loc) {
	switch (loc){
		case  0: 	document.getElementById('cont').src="iframe_0.html";
					break;
		case  1: 	document.getElementById('cont').src="iframe_1.html";
					break;
		case  2: 	document.getElementById('cont').src="iframe_2.html";
					break;
		case  3: 	document.getElementById('cont').src="iframe_3.html";
					break;
		case  4: 	document.getElementById('cont').src="iframe_4.html";
					break;
		default: 	document.getElementById('cont').src="iframe_4.html";
					break;
	};
}
function skuska() {
alert("skuska");	
}
function open_win(zona)
{
window.open("images/"+zona, "zona", "toolbar=no, location=no, directories=no, status=no, menubar=no, scrollbars=no, resizable=no, copyhistory=no, width=420 height=310")
}