<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>主页加载时获取焦点</title> </head> <body onload="document.frm.username.focus()"> <form action="" name="frm"> Username:<input type="text" name="username" value=""><br> Password:<input type="text" name="password" value=""><br> </form> </body> </html>