<div id='box_id' >test </div>
$('#box_ld').css("display","block");
注意：為input 添加只讀的樣式并不是
$("#gameuser_username").css("readonly","readonly");
而是
$("#gameuser_username").attr('readonly','readonly');
/// <summary>
/// 截断字符串(中文计一个字符宽度，其它计半个字符宽度)
/// </summary>
/// <param name="input">需截断的字符串</param>
/// <param name="length">字符宽度</pa ......
