js監聽enter

『壹』 關於js中事件監聽的問題（文本框 回車鍵 失去焦點）

你可以在輸入框裡面一個js事件onkeydown=「document.getElementById('確定按鈕的Id').focus()」
如果還不行把你的代碼貼出來我看下

『貳』 js如何判斷游標是否在某元素上

判斷游標是否在某元素上可以在window監聽onmouseenter（onmouseleave）或者onmouseover（onmouseout）給某變數賦值1（賦值0），那麼變數為1則在元素上（0則不在元素上）
window.onmouseover = function () { isOn = 1};
window.onmouseout = function () { isOn = 0};
window中mouse相關事件補充：
onmousedown 滑鼠按鈕被按下 (和onmouseup組成了單擊事件)；
onmouseenter 當滑鼠指針移動到元素上時觸發 (只在進入後觸發一次，不支持冒泡，子元素不觸發);
onmouseleave 當滑鼠指針移出元素時觸發 (只在離開後觸發一次，支持冒泡，子元素也可以觸發)；
onmousemove 滑鼠被移動 (在元素內移動會一直觸發)；
onmouseover 滑鼠移到某元素之上 (只在進入後觸發一次，支持冒泡，子元素也可以觸發);
onmouseout 滑鼠從某元素移開 (只在離開後觸發一次，支持冒泡，子元素也可以觸發)；
onmouseup 滑鼠按鍵被松開;

『叄』 怎麼在JS中增加鍵盤監聽

鍵盤的每個鍵都有對應的事件值，用按鍵按下或抬起事件，就可以綁定了，事件和對應值如下：
1、keydown()
keydown事件會在鍵盤按下時觸發.
2、keyup()
keyup事件會在按鍵釋放時觸發,也就是你按下鍵盤起來後的事件
3、keypress()
keypress事件會在敲擊按鍵時觸發,我們可以理解為按下並抬起同一個按鍵

對應值：
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 = right 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

『肆』 用js怎麼寫一個回車鍵盤事件

<script type="text/javascript" language=JavaScript charset="UTF-8">

document.onkeydown=function(event){

var e = event || window.event || arguments.callee.caller.arguments[0];

if(e && e.keyCode==27){ // 按 Esc

//要做的事情

}

if(e && e.keyCode==113){ // 按 F2

//要做的事情

}

if(e && e.keyCode==13){ // enter 鍵

//要做的事情

}

};

</script>

(4)js監聽enter擴展閱讀：

Js鍵盤事件

keydown：按鍵按下

keyup：按鍵抬起

keypress：按鍵按下抬起

<body>

<input id="name" type="text" onkeydown="myKeyDown(this.id)" onkeyup="myKeyUp(this.id)">

</body>

<script>

/*輸出輸入的字元*/

function myKeyDown(id) {

console.log(document.getElementById(id).value);

}

/*按鍵結束，字體轉換為大寫*/

function myKeyUp(id) {

var text = document.getElementById(id).value;

document.getElementById(id).value = text.toUpperCase();

}

</script>

常用的鍵盤事件對應的鍵碼：

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

『伍』 JS 怎麼實現按鈕按下時，相當於空格鍵效果

 JS實現綁定事件監聽的幾種方法 一、行內綁定 行內綁定：在HTML的標簽中通過onclick屬性進行綁定，綁定方式：on+事件名，在將所觸發的事件賦值給該屬性，如下： <button onclick="alert('123');">點擊</button> 二、使用element.onclick進行事件綁定 使用element

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