// JavaScript Document
function show_poptavka(id)
{	

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

//  onclick="location.href = prevratit_email(this.href); return false;"
function prevratit_email(s) 
{
	if (s.substr(0, 7) != 'mailto:') return s;
	var m = 'mailto:';
	for (var i=1; i<=s.length-7;i++) 
		m+=s.charAt(s.length-i);
		
	return m;
}