function showPreview(str){
  window.location="../article2/?id="+str;
  return true;
}
/*
function showPreview(str){
  showLoadingDiv('result_box');
  var url = './preview.php';
  var dt = new Date();
  var pars = 'dt='+dt.getHours()+dt.getMinutes()+dt.getSeconds();
  pars=pars + '&id=' + str;
  
  var myAjax = new Ajax.Request(
                    url,
                    {method: 'get', parameters: pars, onComplete: preview_onComplete, onFailure: preview_reportError}
                    );
  return true;
}
*/
function preview_onComplete(request){
  $('result_box').innerHTML=request.responseText;
}
function preview_reportError(request){
  alert('Sorry. There was an error. ');
}