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JS 参考手册
Input Email name 属性
tryjsref_email_name2
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<!DOCTYPE html> <html> <body> E-mail: <input type="email" id="myEmail" name="usremail"> <p>Click the buttons to display and/or change the value of the name attribute of the email field.</p> <button onclick="display()">Display name</button> <button onclick="change()">Change name</button> <script> function display() { var x = document.getElementById("myEmail").name; alert("The name of the email field is: " + x); } function change() { var x = document.getElementById("myEmail").name = "newEmailName"; alert ("The name was changed to: " + x); } </script> </body> </html>