//-----------------------------------------------------------------------------
// kontrola formulare (inputy oznacene rel="required")

var styleNormal='btn';
var styleDisabled='btn-dis';

function validateForm(form, relValue){
  var submit;
  var dis=false;
  var inputs = form.getElementsByTagName('input');
  for(var i=0; i < inputs.length; i++) {
    if(inputs[i].type=='submit') submit=inputs[i];
    if(inputs[i].getAttribute('rel')==relValue){
      if(inputs[i].value==''){
        dis=true;
      }
    } 
  }
  
  var inputs = form.getElementsByTagName('textarea');
  for(var i=0; i < inputs.length; i++) {
    if(inputs[i].getAttribute('rel')=='required'){
      if(inputs[i].value==''){
        dis=true;
      }
    } 
  }
  
  submit.disabled=dis;
  if(dis) 
    submit.className=styleDisabled;
  else
    submit.className=styleNormal;
}


//------------------------------------------------------------------------------

function getObj(id) {
  if (Boolean(document.getElementById))
    return document.getElementById(id);
  else if (Boolean(document.all))
    return eval('document.all.'+id);
  else
    return eval('document.'+id);
}