bootstrap的表单form

(1)默认表单

<form>

<div class="form-group">

<label class="control-label" for=""></label>

<input class="form-control">

<span class="help-block"></span>

</div>

</form>

  <h1>默认表单</h1>
     <form action="#">
         <div class="form-group">
             <label for="uname" class="control-label">用户名</label>
             <input type="text" id="uname" class="form-control">
             <span class="help-block">字母下划线3-8位</span>
         </div>
         <div class="form-group">
             <label for="upwd" class="control-label">密码</label>
             <input type="password" id="upwd" class="form-control">
             <span class="help-block">密码为6-8位</span>
         </div>
         <div class="form-group">
             <div class="checkbox">
             <label><input type="checkbox">七天免密登陆</label>
             </div>
         </div>
         <div class="form-group">
             <input type="button" id="login" value="登录" class="btn btn-success">
             <input type="button" id="logout" value="取消" class="btn btn-danger">
         </div>
     </form>

(2)行内表单

<form class="form-inline">

<div class="form-group">

<label class="sr-only"></label>

<input class="form-control">

</div>

</form>

  <h1>行内表单</h1>
     <h3> Screen Reader Only sr-only</h3>
     <form action="#" class="form-inline">
         <div class="form-group">
             <label for="uname1" class="sr-only"> 用户名</label>
             <input class="form-control" type="text" placeholder="请输入用户名" id="uname1">
         </div>
         <div class="form-group">
             <lable for="upwd1" class="sr-only">密码</lable>
             <input class="form-control" type="password" placeholder="请输入密码" id="upwd1">
         </div>
         <div class="form-group"><input type="button" value="登陆" class="btn btn-success"></div>
     </form>

(3)水平表单

水平表单=表单+栅格系统(变种)

<form class=" form-horizontal ">

<div class="form-group">

<div class="col-*-*">

<label class="sr-only"></label>

</div>

<div class="col-*-*">

<input class="form-control">

</div>

</div>

</form>

  <h1>形式3：水平表单</h1>
     <p>水平表单=表单+栅格系统</p>
     <form action="#" class="form-horizontal"> <!--等价于div.container-->
         <div class="form-group"><!--div.row-->
             <div class="col-sm-1"><label for="uname3" class="control-label">用户名</label></div>
             <div class="col-sm-3"> <input type="text" class="form-control" id="uname3"></div>
             <div class="col-sm-5"> <span class="help-block">字母数字，，，，，</span></div>
         </div>
         <div class="form-group"><!--div.row-->
             <div class="col-sm-1"><label for="upwd2" class="control-label">密码</label></div>
             <div class="col-sm-3"> <input type="text" class="form-control" id="upwd2"></div>
             <div class="col-sm-5"> <span class="help-block">密码位数，，，，，</span></div>
         </div>
         <div class="form-group"><!--div.row-->
             <div class="col-sm-1"> <input type="button" class="btn btn-success" value="登陆"></div>
             <div class="col-sm-1"> <input type="button" class="btn btn-danger" value="取消"></div>
         </div>