function trim(str)
{
    return str.replace(/^\s+|\s+$/g,'');
}

function zobraz(id){
	document.getElementById(id).style.display = 'block';
}

function skry(id){
	el=document.getElementById(id).style.display = 'none';
}

function collapse_menu(id)
{
	document.getElementById(id).style.display = document.getElementById(id).style.display == 'none' ? 'block' : 'none';
}

function changeClass(elem)
{
	if(elem.className.search("no-subkat") == -1 && elem.className.search("no-collapse") == -1) elem.className = elem.className.replace("collapse","no-collapse");
	else if(elem.className.search("no-subkat") == -1 && elem.className.search("no-collapse") > -1) elem.className = elem.className.replace("no-collapse","collapse");
}

function getCookie(Name){ 
var re=new RegExp(Name+"=[^;]+", "i"); //construct RE to search for target name/value pair
if (document.cookie.match(re)) //if cookie found
return document.cookie.match(re)[0].split("=")[1] //return its value
return ""
}

function setCookie(name, value){

document.cookie = name+"="+value+";"+"path=/"; //cookie value is domain wide (path=/)

}