<!DOCTYPE html>
<html>
<body>
A FileUpload object:
<input type="file" id="myFile" name="filename">
<p>Click the buttons below to display and/or change the value of the name attribute of the file button above.</p>
<button onclick="display()">Display name</button>
<button onclick="change()">Change name</button>
<script>
function display() {
var x = document.getElementById("myFile").name;
alert("The name of the file button is: " + x);
}
function change() {
var x = document.getElementById("myFile").name = "newFileName";
alert ("The name was changed to: " + x);
}
</script>
</body>
</html>