<input type="file" name="file1" >

.fileUpload {
background: #fff;
border: 0;
display: block;
margin: 2% 0 5% 0;
width: 100%;
/* border radius */
-o-border-radius: 6px;
-moz-border-radius: 6px;
-webkit-border-radius: 6px;
border-radius: 6px;
}

.fileUpload .fileBtn {
background: #2C88D6;
cursor: pointer;
float: left;
font-size: 1em;
font-weight: bold;
padding: 3% 0;
text-align: center;
width: 33%;
/* border radius */
-o-border-radius: 6px 0 0 6px;
-moz-border-radius: 6px 0 0 6px;
-webkit-border-radius: 6px 0 0 6px;
border-radius: 6px 0 0 6px;
}
.fileUpload .fileBtn:hover {
background: #2C4356;
}

.fileUpload .fileName {
float: right;
overflow: hidden;
white-space: nowrap;
width: 67%;
text-align: center;
color: #000;
padding: 3% 0;
}

.fileUpload .fileBtn:hover {
-webkit-transition-property: background;
-webkit-transition-duration: 0.4s;
-webkit-transition-timing-function: ease-in;
-moz-transition-property: background;
-moz-transition-duration: 0.4s;
-moz-transition-timing-function: ease-in;
-o-transition-property: background;
-o-transition-duration: 0.4s;
-o-transition-timing-function: ease-in;
-ms-transition-property: background;
-ms-transition-duration: 0.4s;
-ms-transition-timing-function: ease-in;
transition-property: background;
transition-duration: 0.4s;
transition-timing-function: ease-in;
}

.fileUpload:after {
clear: both;
content: " ";
display: block;
height: 0;
line-height: 0;
visibility: hidden;
}

<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
<script src="js/fileinput.js"></script>

<script>
$(document).ready(function() {
fileInput();
});
</script>

fi_container_class = fi_container_class || 'fileUpload';

fi_button_class = fi_button_class || 'fileBtn';

fi_filename_class = fi_filename_class || 'fileName';

fi_button_text = fi_button_text || 'Обзор...';