http://www.jb51.net/web/39559.html javascript
<form><a class="btn_addPic" href="javascript:void(0);"><span><em>+</em>添加圖片</span> <input class="filePrew" title="支持jpg、jpeg、gif、png格式,文件小於5M" tabindex="3" type="file" name="pic" size="3"></a></form> html
- *{margin:0;padding:0;}
- a{text-decoration:none;}
- .btn_addPic{
- display: block;
- position: relative;
- width: 140px;
- height: 39px;
- overflow: hidden;
- border: 1px solid #EBEBEB;
- background: none repeat scroll 0 0 #F3F3F3;
- color: #999999;
- cursor: pointer;
- text-align: center;
- }
- .btn_addPic span{display: block;line-height: 39px;}
- .btn_addPic em {
- background:url(http://p7.qhimg.com/t014ce592c1a0b2d489.png) 0 0;
- display: inline-block;
- width: 18px;
- height: 18px;
- overflow: hidden;
- margin: 10px 5px 10px 0;
- line-height: 20em;
- vertical-align: middle;
- }
- .btn_addPic:hover em{background-position:-19px 0;}
- .filePrew {
- display: block;
- position: absolute;
- top: 0;
- left: 0;
- width: 140px;
- height: 39px;
- font-size: 100px; /* 增大不一樣瀏覽器的可點擊區域 */
- opacity: 0; /* 實現的關鍵點 */
- filter:alpha(opacity=0);/* 兼容IE */
- }