function keywordsearch_submit() {
   //var keywords = document.forms['search_SearchBlock'].elements['searchCriteria'].value;
   var keywords = document.getElementById('searchCriteria').value;

   var itemstring= keywords.replace(/\ +/, ",");

   window.location.href = "main.php?g2_view=keyalbum.KeywordAlbum&g2_keyword=" +  itemstring;
}

function keywordsearch_init() {
   var formular = document.getElementById('search_SearchBlock');

   formular.action="javascript:keywordsearch_submit();";
}