function CheckSearchForm() { if (document.SearchForm ("txtitle").value==""){alert("请输入查询关键字!");document.SearchForm ("txtitle").value="";document.SearchForm("txtitle").focus();return false;} if (document.SearchForm ("txtitle").value=="站内信息搜索"){alert("请输入查询关键字!");document.SearchForm ("txtitle").value="";document.SearchForm("txtitle").focus();return false;} return true; }