点击运行
<html> <head> <script type="text/javascript"> function upperCase() { var x=document.getElementById("fname").value document.getElementById("fname").value=x.toUpperCase() } </script> </head> <body> Enter your name: <input type="text" id="fname" onblur="upperCase()"><br /> Enter your age: <input type="text" id="age" onblur="alert(this.id)"> </body> </html>
运行结果
