Try with this code:
Enter lowercase letters for conversion to uppercase:
<form name="converter"> <input type="text" name="input" id="input" value="sample" onchange="upperMe()" /><br /> <input type="text" name="output" id="output" value="" /> </form>
JavaScript:
<script type="text/javascript"> function upperMe() { document.getElementById("output").value = document.getElementById("input").value.toUpperCase(); } </script>
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