function keyWordSearch() {

    var sData=keyWordXML(key_word_form.key_word_input.value, 'MCU', 'ADVERT');

    if (sData!='x') {

      //form_head.cat.value='MCU';

      //form_head.obj.value='ADVERT';

      form_head.searchcriterion.value='key word= '+ key_word_form.key_word_input.value;

      form_head.data.value=sData;

      form_head.submit();

    }else {

      alert ('Please, insert a search criteria.');

      key_word_form.key_word_input.focus();

    }

  }