HTML 大写转小写
<!DOCTYPE html>
<html><head><meta charset="utf-8"><title>童心少年</title><script>function asd(){var str=document.getElementById("fname");str.value=str.value.toUpperCase();}</script></head><body> <p>请输入你的名字: </p><input type="text" id="fname" onmouseout="asd()"><p id="demo"></p></body>
</html>