<!DOCTYPE html>
<html>
<head>
<title>JS Code Testing</title>
</head>
<body>
<input type = "text" id = "fname" onchange = "jsFun()">
<script>
function jsFun(){
var x = document.getElementById("fname");
x.value = x.value.toUpperCase();
}
</script>
</body>
</html>
No comment to show.