function openW(url,jmeno,sirka, vyska)
{
	wname=window.open(url, jmeno,"scrollbars=yes,toolbar=no,location=no,directories=no,status=yes,menubar=no,resizable=yes,width="+sirka+", height="+vyska+",top=50,left=50");
	wname.focus();
}

// JavaScript Document
function show_prvek(id)
{	

	var xxxx = document.getElementById(id);
	
	if(xxxx.style.display == 'none') {
		xxxx.style.display = 'block';
	}
	else {
		xxxx.style.display = 'none';	
	}
}