function linksExternal()
{
 if(document.getElementsByTagName)
 {
  var anchors = document.getElementsByTagName("a");
  for (var i=0; i<anchors.length; i++)
  {
   var anchor = anchors[i];
   if (anchor.getAttribute("rel") == "external")
   {
    anchor.target = "_blank";
   }
  }
 }
}

function ukazObrazek(obrazek,w,h)
{
 w = open(obrazek, "_blank", "scrollbars,resizable,width="+(w+40)+",height="+(h+50));
}

function odesliFormular(id)
{
 if(document.getElementById)
 {
  obj = document.getElementById(id);
  if(obj)
  {
   if(obj.submit)
   {
    obj.submit();
   }
  }
 }
}

function nastavViditelnost(id, viditelnost)
{
 if(document.getElementById)
 {
  obj = document.getElementById(id);
  if(obj)
  {
   obj.style.visibility = (viditelnost)?('visible'):('hidden');
  }
 }
}

function start()
{
 linksExternal();
}

function nastavHodnotu(id, v)
{
 if(document.getElementById)
 {
  var obj = document.getElementById(id);
  if(obj)
  {
   obj.value = v;
  }
 }
}

function ziskejHodnotu(id)
{
 if(document.getElementById)
 {
  var obj = document.getElementById(id);
  if(obj)
  {
  	var v = obj.value;
  	var f = parseFloat(v.replace(/,/,'.'));
		if(f != 0)
  	{
  		v = f;
		}
		return v;
  }
 }
 return false;
}