var changestatus = "${changeStatus}";//後臺傳遞的status
    //獲取公告狀態select中資料
    $.ajax({
        type:"post",
        url:'/bulletin/bulletinAction!getBulletinStautsSelectOption.do',
        datatype: "json",
        data: {
        },
        success:function(data){
            var str = data;
            $("#status").html(str); 
           if(changestatus != null && "" != changestatus){
           $("#status option").each(function(){
            if($(this).val() == changestatus){
                $(this).attr("selected",true);
            }
            });
          }

        }
    });
 

div中文字的自動換行

<div style='width:98%;clear:both;word-wrap:break-word;'>9999999999999999999999999</div>

width:98%：繼承的是父div的寬度。