// otevre okno s vyberem taxonu/zdroju
function list(type) {
  window.open('list.php?what=' + type, 'select_list', 'width=400,height=500,' +
              'scrollbars=yes,location=no,toolbar=no,status=no,menubar=no').focus();
}
// vymaze vyhledavaci formular
function empty() {
  document.forms.search.elements.taxon.value    = "";
  document.forms.search.elements.source.value   = "";
  document.forms.search.elements.fulltext.value = "";        
  document.forms.search.elements.number.value   = "";
  document.forms.search.elements.number_min.value   = "";
  document.forms.search.elements.number_max.value   = "";    
}

// copyright 1999 Idocs, Inc. http://www.idocs.com
// Distribute this script freely but keep this notice in place
function numbersonly(myfield, e, dec)
{
var key;
var keychar;

if (window.event)
   key = window.event.keyCode;
else if (e)
   key = e.which;
else
   return true;
keychar = String.fromCharCode(key);

// control keys
if ((key==null) || (key==0) || (key==8) || 
    (key==9) || (key==13) || (key==27) )
   return true;

// numbers
else if ((("0123456789").indexOf(keychar) > -1))
   return true;

// decimal point jump
else if (dec && (keychar == "."))
   {
   myfield.form.elements[dec].focus();
   return false;
   }
else
   return false;
}