function search()   
{
  var frm=document.frmsearch;
  var keyword=frm.keyword.value;
  if (Trim(keyword).length<=0) return;
  if (keyword.length>=50){
	  alert("搜索词过长，请重新填写");
	  return;
  }
  frm.action="/search/";
  frm.submit();
}