确定在div中单击了哪个按钮 [英] Determine which button was clicked inside a div
本文介绍了确定在div中单击了哪个按钮的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我有以下HTML代码(无法更改)，并且我想编写一个JavaScript代码来确定单击了从A到Z的哪个按钮.知道我该怎么做吗?这是我尝试过的方法，但是我总是得到结果字母".我也可以这样写:
I have the following HTML code (I can't change it) and I want to do a javascript code to determine which button of those from A to Z was clicked. Any idea how I can do this? Here is what I tried, but I always get the result "alphabet". I could also write:
document.getElementById("A").onclick = buton;,
document.getElementById("B").onclick = buton;
等在 myMain 函数中，但是有一个简单的解决方案吗?
and so on inside myMain function but is there a simple solution?
<html>
<head>
<script>
window.onload = myMain;
function myMain() {
document.getElementById("alphabet").onclick = buton;
}
function buton() {
alert(this.id);
}
</script>
</head>
<body>
<div id="alphabet">
<button id="A">A</button> <button id="B">B</button> <button id="C">C</button> <button id="D">D</button> <button id="E">E</button> <button id="F">F</button>
<button id="G">G</button> <button id="H">H</button> <button id="I">I</button> <button id="J">J</button> <button id="K">K</button> <button id="L">L</button>
<button id="M">M</button> <button id="N">N</button> <button id="O">O</button> <button id="P">P</button> <button id="Q">Q</button> <button id="R">R</button>
<button id="S">S</button> <button id="T">T</button> <button id="U">U</button> <button id="V">V</button> <button id="W">W</button> <button id="X">X</button>
<button id="Y">Y</button> <button id="Z">Z</button>
</div>
</body>
</html>
推荐答案
您可以使用事件对象
window.onload = myMain;
function myMain() {
document.getElementById("alphabet").onclick = buton;
}
function buton(e) {
if (e.target.tagName == 'BUTTON') {
alert(e.target.id);
}
}<div id="alphabet">
<button id="A">A</button>
<button id="B">B</button>
<button id="C">C</button>
<button id="D">D</button>
<button id="E">E</button>
<button id="F">F</button>
<button id="G">G</button>
<button id="H">H</button>
<button id="I">I</button>
<button id="J">J</button>
<button id="K">K</button>
<button id="L">L</button>
<button id="M">M</button>
<button id="N">N</button>
<button id="O">O</button>
<button id="P">P</button>
<button id="Q">Q</button>
<button id="R">R</button>
<button id="S">S</button>
<button id="T">T</button>
<button id="U">U</button>
<button id="V">V</button>
<button id="W">W</button>
<button id="X">X</button>
<button id="Y">Y</button>
<button id="Z">Z</button>
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