function doPopup(URL, WIDTH, HEIGHT) {
	url = URL;
	width = WIDTH;  // width of window in pixels
	height = HEIGHT; // height of window in pixels
	windowprops = "left=50,top=50,width=" + WIDTH + ",height=" + HEIGHT + "toolbar=no," + "location=no," + "directories=no," + "status=no," + "menubar=no," + "scrollbars=no," + "resizable=no,";
	preview = document.open(URL, "_blank", windowprops);
}

function ShowOtherInfo(ItemID) {
    document.getElementById(ItemID).style.display = 'block';
}
function HideOtherInfo(ItemID) {
    document.getElementById(ItemID).style.display = 'none';
}

function HideShowOtherInfo(ItemID) {

    if (document.getElementById(ItemID).style.display == 'none')
        document.getElementById(ItemID).style.display = 'block';
    else
        document.getElementById(ItemID).style.display = 'none';
}

function externalLinks() {
 if (!document.getElementsByTagName) return;
 var anchors = document.getElementsByTagName("a");
 for (var i=0; i<anchors.length; i++) {
   var anchor = anchors[i];
   if (anchor.getAttribute("href") &&
       anchor.getAttribute("rel") == "external")
     anchor.target = "_blank";
 }
}
window.onload = externalLinks;

function echeck(str) {
  var at="@"
  var dot="."
  var msdz="Zadajte email správneho tvaru."
  var lat=str.indexOf(at)
  var lstr=str.length
  var ldot=str.indexOf(dot)
  if (str.indexOf(at)==-1){
     alert(msdz)
     return false
  }
  if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
     alert(msdz)
     return false
  }
  if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
      alert(msdz)
      return false
  }
   if (str.indexOf(at,(lat+1))!=-1){
      alert(msdz)
      return false
   }
   if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
      alert(msdz)
      return false
   }
   if (str.indexOf(dot,(lat+2))==-1){
      alert(msdz)
      return false
   }
   if (str.indexOf(" ")!=-1){
      alert(msdz)
      return false
   }
   return true          
}


function check_email(e) {
	ok = "1234567890qwertyuiop[]asdfghjklzxcvbnm.@-_QWERTYUIOPASDFGHJKLZXCVBNM";
	for(i = 0; i < e.length ; i++) {
		if (ok.indexOf(e.charAt(i)) < 0) {
			return (false);
		}	
	} 

	if (document.images) {
		re = /(@.*@)|(\.\.)|(^\.)|(^@)|(@$)|(\.$)|(@\.)/;
		re_two = /^.+\@(\[?)[a-zA-Z0-9\-\.]+\.([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$/;
		if (!e.match(re) && e.match(re_two)) {
		return (-1);
		}
	}
}

function checkMailingForm(form_object) {

	if (!check_email(form_object.Email.value)) {
		alert('Email adresa nie je v správnom formáte.');
		form_object.Email.focus();
		return false;
	}
	else
		return true;
}