function fillMail(obj) {
  if(obj.value == 'Váš e-mail')
  	obj.value = '';
}
function fillQuestion(obj) {
	if(obj.value == 'Váš dotaz')
		obj.value = '';
}

function getElementsByClass(searchClass,node,tag) {
  var classElements = new Array();
  if ( node == null )
    node = document;
  if ( tag == null )
    tag = '*';
  var els = node.getElementsByTagName(tag);
  var elsLen = els.length;
  var pattern = new RegExp('(^|\\s)'+searchClass+'(\\s|$)');
  for (igc = 0, jgc = 0; igc < elsLen; igc++) {
    if ( pattern.test(els[igc].className) ) {
      classElements[jgc] = els[igc];
      jgc++;
    }
  }
  return classElements;
}