Easy fix $('#verMailDate').attr("value",data.verMailDate);
to $('#verMailDate').attr("value","" + data.verMailDate); On Sep 10, 12:17 pm, Junhua Gao <gaojun...@gmail.com> wrote: > $.getJSON('/VersionQueryJsonAction',{verID:verid},function(data){ > $('#verMailDate').attr("value",data.verMailDate); > $('#statementName').attr("value",data.statementName); > > })//CampaignJsonAction,function,getJSON > > if data.verMailDate is null,i need it is "",not "null",who can help me?