function gridRestore(grid_id) {
//   $('#debug').append("RESTORE<BR>");
  $('.filt-text-'+grid_id).val('');
  jQuery('#'+grid_id).removePostDataItem('filt');
  jQuery('#'+grid_id).removePostDataItem('filtField');
  jQuery('#'+grid_id).removePostDataItem('filtValue');
  jQuery('#'+grid_id)
    .setGridParam({ page: 1 })
    .trigger("reloadGrid");
}


function gridFilter(field_id) {
  var grid_id = $("#"+field_id).attr('filt-grid');
  var field   = $("#"+field_id).attr('filt-index');
  var value   = $("#"+field_id).val();

  // Make sure we're not issuing blank queries.
  // It will work without observable effect, but
  // it will result in slower queries.  Just
  // clear out all filter terms instead.
  if (value == '') {
    gridRestore(grid_id);
    return;
  }

//   $('#debug').append("RELOAD: field_id:"+field_id+"; grid:"+grid_id+"; field:"+field+"; value:"+value+"<BR>");
  jQuery('#'+grid_id).setPostDataItem('filt', true);
  jQuery('#'+grid_id).setPostDataItem('filtField', field);
  jQuery('#'+grid_id).setPostDataItem('filtValue', value);

  $('.filt-text-'+grid_id).each(function(){
      if ($(this).attr('id') != field_id)
	$(this).val('');
    });
  
  jQuery('#'+grid_id)
    .setGridParam({ page: 1 })
    .trigger("reloadGrid");
}


var timeoutHnd;
function handleFiltKeydown(e){
  var field_id = $(this).attr('id');
  if (e.which == 8 || e.which >= 32) /* backspace OR printable */
    {
//       $('#debug').append("KEYDOWN: id:"+field_id+"<BR>");
      if(timeoutHnd)
        clearTimeout(timeoutHnd);
      timeoutHnd = setTimeout(function()
			      {gridFilter(field_id)},
			      500);
    }
  else
    handleFiltReturn(e);
}

function handleFiltReturn(e) {
  var field_id = $(this).attr('id');
  if (e.which == 10 || e.which == 13) {
//     $('#debug').append("KEYDOWN: id:"+field_id+" CHAR 10/13<BR>");
    if(timeoutHnd)
      clearTimeout(timeoutHnd);
    gridFilter(field_id);
  }
}


function enableAutosubmit(state) {
   $(".filt-submit").attr("disabled",state);
   $('.filt-autosearch').attr('checked', state);
   if (state) {
     $(".filt-text").unbind('keydown', handleFiltReturn);
     $(".filt-text").keydown(handleFiltKeydown);
//      $('#debug').append("BIND: id:"+id+"<BR>");
   }
   else {
     $(".filt-text").unbind('keydown', handleFiltKeydown);
     $(".filt-text").keydown(handleFiltReturn);
//      $('#debug').append("UNBIND: id:"+id+"<BR>");
   }
} 


jQuery(document).ready(function(){ 
    $('.filt-submit').click(function(){
	gridFilter($(this).attr('id').replace(/^submit_/, 'filt_'));
      });
    enableAutosubmit(true);
  });