<!DOCTYPE html>
<html>
<body>

Enter your name: <input type="text" id="fname" onblur="myFunction()">

<p>When you leave the input field, a function is triggered which transforms the input text to upper case.</p>

<script>
function myFunction() {
    var x = document.getElementById("fname");
    x.value = x.value.toUpperCase();
}
</script>

</body>
</html>

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 Enter your name:

When you leave the input field, a function is triggered which transforms the input text to upper case.

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프레임에 소문자로 입력하면 마우스 커서가 벗어 낫을때 알아서 대문자로 바꿔준다

 

 

 

 

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