if (getCookie("jquery") == "true") {
} else {
 var allow = false;
 
 if (/Firefox[\/\s](\d+\.\d+)/.test(navigator.userAgent)){ //test for Firefox/x.x or Firefox x.x (ignoring remaining digits);
   var ffversion=new Number(RegExp.$1) // capture x.x portion and store as a number
   if (ffversion>=3) allow = true;    
  } else if (/MSIE (\d+\.\d+);/.test(navigator.userAgent)){ //test for MSIE x.x;
       var ieversion=new Number(RegExp.$1) // capture x.x portion and store as a number
       if (ieversion>=7)  allow = true; 
  } else if (/Opera[\/\s](\d+\.\d+)/.test(navigator.userAgent)){ //test for Opera/x.x or Opera x.x (ignoring remaining decimal places);
       var oprversion=new Number(RegExp.$1) // capture x.x portion and store as a number
        if (oprversion>=9)  allow = true;  
  } else if (/Chrome[\/\s](\d+\.\d+)/.test(navigator.userAgent)){ //test for Chrome/x.x or Chrome x.x (ignoring remaining digits);
   var chversion=new Number(RegExp.$1) // capture x.x portion and store as a number
   if (chversion>=1) allow = true;    
  } else if (/Safari[\/\s](\d+\.\d+)/.test(navigator.userAgent)){ //test for Safari/x.x or Safari x.x (ignoring remaining digits);
   var chversion=new Number(RegExp.$1) // capture x.x portion and store as a number
   if (chversion>=310) allow = true;    
  }
  if (!allow){
  	window.location.replace("index2.php");
  } else {
    var datum= new Date(); // získá aktuální datum v milisekundách
    datum.setTime(datum.getTime() + 1000 * 60 * 60 * 24 * 365); // k datu přidá 356 dni
    document.cookie = "jquery=true;expires=" + datum.toGMTString();
  } 
}
function getCookie(c_name)
{
if (document.cookie.length>0)
  {
  c_start=document.cookie.indexOf(c_name + "=");
  if (c_start!=-1)
    {
    c_start=c_start + c_name.length+1;
    c_end=document.cookie.indexOf(";",c_start);
    if (c_end==-1) c_end=document.cookie.length;
    return unescape(document.cookie.substring(c_start,c_end));
    }
  }
return "";
}