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看到這個Codepen:僞元素(:之後)不在FF/IE中工作,但在Chrome中工作?
http://codepen.io/anon/pen/wcybk
按鈕是否工作在Chrome,而不是IE/FF
<input name="input_15" id="input_6_15" class="medium" tabindex="8" type="file">
#input_6_15{position:relative;}
#input_6_15:after {
content: "Upload Media";
width: 150px;
height: 20px;
background: none repeat scroll 0% 0% #626D2D;
display: block;
position: absolute;
padding: 8px 5px 10px;
color: #FFF;
visibility: visible;
top: 4px;
left: -38px;
text-transform: uppercase;
text-align: center;
line-height: 26px;
z-index: 99999999;
}