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<body>
<input type="file" id="fileupload" name="file" /> <br/>
<input type="file" id="fileupload" name="file" /> <br/>
<input type="file" id="fileupload" name="file" /> <br/>
<input type="file" id="fileupload" name="file" /> <br/>
<input type="file" id="fileupload" name="file" /> <br/>
<button id="clrbtn" type="button">清空</button>
<script type="text/javascript">
document.getElementById('clrbtn').onclick = function() {
var fs = document.getElementsByName('file'), l = fs.length, i = 0;
for (; i < l; i++) {
cleanFile(fs[i]);
}
}
function cleanFile(o) {
if (o.outerHTML) {
o.outerHTML = o.outerHTML;
} else {
o.value = '';
}
}
</script>
</body>