js控制键盘按键(回车、空格)

来源：互联网发布：网络剧有毒第2集编辑：程序博客网时间：2024/09/21 09:03

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<htmlxmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Check Score</title>
<scriptlanguage="JavaScript">
function keyLogin(){
 if (event.keyCode==13)  //回车键的键值为13
   document.getElementByIdx_x("input1").click(); //调用登录按钮的登录事件
} 
</script>
</head>
<bodyonkeydown="keyLogin();">
<inputid="input1"value="登录"type="button"onClick="alert('调用成功！')">
</body>
</html>

<scripttype="text/javascript">
 $(function(){  
      $(document).keypress(function (e) {
        if (e.keyCode == 13)
          //...........code.......
     })
 });
</script>

　keyCode：

keycode    8 = BackSpace BackSpace
keycode    9 = Tab Tab
keycode   12 = Clear
keycode   13 = Enter
keycode   16 = Shift_L
keycode   17 = Control_L
keycode   18 = Alt_L
keycode   19 = Pause
keycode   20 = Caps_Lock
keycode   27 = Escape Escape
keycode   32 = space space
keycode   33 = Prior
keycode   34 = Next
keycode   35 = End
keycode   36 = Home
keycode   37 = Left
keycode   38 = Up
keycode   39 = Right
keycode   40 = Down
keycode   41 = Select
keycode   42 = Print
keycode   43 = Execute
keycode   45 = Insert
keycode   46 = Delete
keycode   47 = Help
keycode   48 = 0 equal braceright
keycode 49 = 1 exclam onesuperior
keycode   50 = 2 quotedbl twosuperior
keycode 51 = 3 section threesuperior
keycode   52 = 4 dollar
keycode   53 = 5 percent
keycode   54 = 6 ampersand
keycode   55 = 7 slash braceleft
keycode   56 = 8 parenleft bracketleft
keycode   57 = 9 parenright bracketright
keycode   65 = a A
keycode   66 = b B
keycode   67 = c C
keycode   68 = d D
keycode   69 = e E EuroSign
keycode   70 = f F
keycode   71 = g G
keycode   72 = h H
keycode   73 = i I
keycode   74 = j J
keycode   75 = k K
keycode   76 = l L
keycode   77 = m M mu
keycode   78 = n N
keycode   79 = o O
keycode   80 = p P
keycode   81 = q Q at
keycode   82 = r R
keycode   83 = s S
keycode   84 = t T
keycode   85 = u U
keycode   86 = v V
keycode   87 = w W
keycode   88 = x X
keycode   89 = y Y
keycode   90 = z Z
keycode   96 = KP_0 KP_0
keycode   97 = KP_1 KP_1
keycode   98 = KP_2 KP_2
keycode   99 = KP_3 KP_3
keycode 100 = KP_4 KP_4
keycode 101 = KP_5 KP_5
keycode 102 = KP_6 KP_6
keycode 103 = KP_7 KP_7
keycode 104 = KP_8 KP_8
keycode 105 = KP_9 KP_9
keycode 106 = KP_Multiply KP_Multiply
keycode 107 = KP_Add KP_Add
keycode 108 = KP_Separator KP_Separator
keycode 109 = KP_Subtract KP_Subtract
keycode 110 = KP_Decimal KP_Decimal
keycode 111 = KP_Divide KP_Divide
keycode 112 = F1
keycode 113 = F2
keycode 114 = F3
keycode 115 = F4
keycode 116 = F5
keycode 117 = F6
keycode 118 = F7
keycode 119 = F8
keycode 120 = F9
keycode 121 = F10
keycode 122 = F11
keycode 123 = F12
keycode 124 = F13
keycode 125 = F14
keycode 126 = F15
keycode 127 = F16
keycode 128 = F17
keycode 129 = F18
keycode 130 = F19
keycode 131 = F20
keycode 132 = F21
keycode 133 = F22
keycode 134 = F23
keycode 135 = F24
keycode 136 = Num_Lock
keycode 137 = Scroll_Lock
keycode 187 = acute grave
keycode 188 = comma semicolon
keycode 189 = minus underscore
keycode 190 = period colon
keycode 192 = numbersign apostrophe
keycode 210 = plusminus hyphen macron
keycode 211 =
keycode 212 = copyright registered
keycode 213 = guillemotleft guillemotright
keycode 214 = masculine ordfeminine
keycode 215 = ae AE
keycode 216 = cent yen
keycode 217 = questiondown exclamdown
keycode 218 = onequarter onehalf threequarters
keycode 220 = less greater bar
keycode 221 = plus asterisk asciitilde
keycode 227 = multiply division
keycode 228 = acircumflex Acircumflex
keycode 229 = ecircumflex Ecircumflex
keycode 230 = icircumflex Icircumflex
keycode 231 = ocircumflex Ocircumflex
keycode 232 = ucircumflex Ucircumflex
keycode 233 = ntilde Ntilde
keycode 234 = yacute Yacute
keycode 235 = oslash Ooblique
keycode 236 = aring Aring
keycode 237 = ccedilla Ccedilla
keycode 238 = thorn THORN
keycode 239 = eth ETH
keycode 240 = diaeresis cedilla currency
keycode 241 = agrave Agrave atilde Atilde
keycode 242 = egrave Egrave
keycode 243 = igrave Igrave
keycode 244 = ograve Ograve otilde Otilde
keycode 245 = ugrave Ugrave
keycode 246 = adiaeresis Adiaeresis
keycode 247 = ediaeresis Ediaeresis
keycode 248 = idiaeresis Idiaeresis
keycode 249 = odiaeresis Odiaeresis
keycode 250 = udiaeresis Udiaeresis
keycode 251 = ssharp question backslash
keycode 252 = asciicircum degree
keycode 253 = 3 sterling
keycode 254 = Mode_switch　

case 8: keyName = "[退格]"; break;
    　　　 case 9: keyName = "[制表]"; break;
    　　　 case 13:keyName = "[回车]"; break;
    　　　 case 32:keyName = "[空格]"; break;
    　　　 case 33:keyName = "[PageUp]";   break;
    　　　 case 34:keyName = "[PageDown]";   break;
    　　　 case 35:keyName = "[End]";   break;
    　　　 case 36:keyName = "[Home]";   break;
    　　　 case 37:keyName = "[方向键左]";   break;
    　　　 case 38:keyName = "[方向键上]";   break;
    　　　 case 39:keyName = "[方向键右]";   break;
   　　　   case 40:keyName = "[方向键下]";   break;
    　　　 case 46:keyName = "[删除]";   break;
    　　　 default:keyName = "";    break;

本文实例讲述了JS按回车键实现登录的方法，该功能有着非常广泛的实用价值。分享给大家供大家参考之用。具体方法如下：

方法一：

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<htmlxmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Check Score</title>
<scriptlanguage="JavaScript">
function keyLogin(){
 if (event.keyCode==13)  //回车键的键值为13
   document.getElementByIdx_x("input1").click(); //调用登录按钮的登录事件
} 
</script>
</head>
<bodyonkeydown="keyLogin();">
<inputid="input1"value="登录"type="button"onClick="alert('调用成功！')">
</body>
</html>

方法二：

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<script> 
function KeyDown() 
{ 
  if(event.keyCode == 13)
  {
    event.returnValue=false;
    event.cancel =true;
    Form1.btnsubmit.click();
  }
} 
</script>

使用方法：

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<formname="Form1"method="">
用户名:<INPUTTYPE=textSIZE=20maxlength= 8onkeydown=KeyDown()>
密码:<INPUTTYPE=passwordSIZE=20maxlength= 8onkeydown=KeyDown()>
<inputtype="submit"name="btnsubmit"value="提交"/>
</form>

方法三：

任何一个网站页面都有登陆界面,很多时候在输入好用户名和密码后,还要用鼠标去点一个类似于登陆什么的按钮或者链接.这样你才能进网站做你喜欢做的事情.
有时候我就在想是不是能在输入好我该输入的东西后,直接敲回车就执行登陆功能呢?解决方法如下：

ss.html页面代码:

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<html>
<head>
<title></title>
<metahttp-equiv="Content-Type"content="text/html; charset=gb2312">
<linkrel="stylesheet"href="css/text.css"type="text/css">
</head>
<bodybgcolor="#FFFFFF"text="#000000"leftmargin="0"topmargin="0"marginwidth="0"marginheight="0"onkeydown="on_return();">
  <formname="loginForm"method="post"action="fuck.html">        
   <tablewidth="100%"border="0"cellspacing="0"cellpadding="0">
 <tr>
 <tdwidth="69%"height="30"><spanclass="font_04">帐户名</span>
  <inputtype="text"name="userName"size="18.5">
 </td>
    </tr>
    <tr>
 <tdwidth="69%"height="30"><spanclass="font_04">密　码</span>
  <inputtype="password"name="pwd">
 </td>
    </tr>
    <tr>
 <tdwidth="31%"height="30">
 <aid="sub"onClick='check()'>
 登陆</a></td>
    </tr>
   </table>
  </form>
</body>
</html>
<scriptlanguage="javascript">
function check() {
    var formname=document.loginForm;
   if (formname.userName.value == "") {
    alert("请输入用户名！");
    formname.userName.focus();
    return false;
  }
  if (formname.pwd.value == "") {
    alert("请输入密码！");
    formname.pwd.focus();
    return false;
  }
  formname.submit();
} 
  //回车时，默认是登陆
 function on_return(){
 if(window.event.keyCode == 13){
  if (document.all('sub')!=null){
   document.all('sub').click();
   }
 }
 }
</script>

此处注意：在<body>里面我们加了onkeydown属性,这样我们输入好内容后按键就可以直接执行JS方法on_return()了.因为window.event.keyCode 如果是13的话,表示回车键,所以我们判断我们按的键是不是回车键,如果是我们就去找'sub'属性,假如找到了执行click方法就是了。

希望本文所述方法对大家的web程序设计有所帮助。

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