【file_upload】
<html>
<body>
<script language="JavaScript">
function getType(){
var mytype = document.form1.uploadbox.type;
console.log("The input box type is: " + mytype);
}
</script>
<form name="form1">
<input type="file" name="uploadbox">
<br><br>
Click on the button below.
<br>
<input type="button" value="Get Type" onClick='getType()'>
</form>
</body>
</html>
