js实现上传图片立即回显

<script type="text/javascript">
//门头照片
function newFile() {
var windowURL = window.URL || window.webkitURL;
var loadImg = windowURL.createObjectURL(document.getElementById('photoPic').files[0]);
 document.getElementById('newImg').setAttribute('src',loadImg);
 } 
//营业执照复印件
function oldFile() {
var windowURL = window.URL || window.webkitURL;
var loadImg = windowURL.createObjectURL(document.getElementById('licensePic').files[0]);
 document.getElementById('oldImg').setAttribute('src',loadImg);
 } 
</script>

 <div class='form-div'>
<label class="form-label">门头照片<b>*</b></label>
<div class="up-pic">
<img src="" id="newImg" > 
<span>+</span>
<input type="file" id="photoPic" onchange="newFile()" name="photoPic" multiple="true" class="form-input file-pic"/>
</div>
</div>
<div class='form-div'>
<label class="form-label">营业执照复印件<b>*</b></label>
<div class="up-pic">
<img src="" id="oldImg" > 
<span>+</span>
<input type="file" id="licensePic" onchange="oldFile()" name="licensePic" multiple="true" class="form-input file-pic"/>
</div>
</div>