键盘错误声音捕捉KeyCode时

Question

我正在编写与JavaScript捕获键盘输入的东西，但问题是，每当用户按下一个键时出现错误声音。我该如何禁用它？

Answer 1

@ Polaris878

function KeyPressed(e) 
{ 
    if (!e) e = window.event; 
    if (e.which) 
    { 
     keycode = e.which 
    } 
    else if (e.keyCode) 
    { 
     keycode = e.keyCode 
    } 
    switch (keycode) 
    { 
    case 49: 
     key = "1"; 
     break; 
    case 50: 
     key = "2"; 
     break; 
    case 51: 
     key = "3"; 
     break; 
    case 52: 
     key = "4"; 
     break; 
    case 53: 
     key = "5"; 
     break; 
    case 54: 
     key = "6"; 
     break; 
    case 55: 
     key = "7"; 
     break; 
    case 56: 
     key = "8"; 
     break; 
    case 57: 
     key = "9"; 
     break; 
    case 48: 
     key = "0"; 
     break; 
    default: 
     key = ""; 
     return false; 
     break 
    } 
    if (keys == "NULL") 
    { 
     keys = key 
    } 
    else 
    { 
     keys = keys + key 
    } if (keys.length >= 5) 
    { 
     document.formular.submit(); 
    } 
    document.formular.code.value = keys; 
} 
var keys = ""; 
document.onkeydown = KeyPressed