制作一个漂亮的file文件上传控件样式的实例教程

<form action=""method="post"enctype="multipart/form-data">
    <a href="#" class="a-upload"><input type="file" name="file" id="file">点击这里上传图片</a>

</form>

 .a-upload {
    padding: 4px 10px;
    width: 200px;
      height: 30px;
      box-sizing: border-box;
    line-height: 20px;
    position: relative;
    cursor: pointer;
    color: #888;
    background: #fafafa;
    border: 1px solid #ddd;
    border-radius: 4px;
    overflow: hidden;
    display: inline-block;
    *display: inline;
    *zoom: 1;
   top: 5px;
}

.a-upload  input {
    position: absolute;
    font-size: 100px;
    opacity: 0;
    filter: alpha(opacity=0);
    cursor: pointer;
     width: 200px;
      height: 30px;
      left: 0;
      top: 0;
}

.a-upload:hover {
    color: #444;
    background: #eee;
    border-color: #ccc;
    text-decoration: none
}