1. Table：table,table-bordered,table,table-hover,table-condensed,

2. tr,td：active,success,warning,danger,info

3. Form:form-group -> form-control, form-inline,form-horizontal,

4. Button: <a>, <button>, or <input> element. 

   btn-default,btn-primary,btn-success,btn-info,btn-warning,btn-danger,btn-link
   
   .btn-lg, .btn-sm, or .btn-xs
   

    5. Images：img-responsive,center-block,image-rounded,img-circle,img-thumbnaile

    6. close,