[問題] 動態建立Element
<html>
<script type="text/javascript">
function mAlert() {
alert(this.value);
}
function mLoad(){
var obj = document.createElement("Input");
obj.type = "button";
obj.value = "btn";
obj.onclick = mAlert;
document.getElementById("div").appendChild(obj);
}
</script>
<body onload="mLoad()">
<input type="button" id="btn2" value="btn2" onclick="mAlert()">
<div id="div">
</div>
</body>
</html>
上頭的程式執行後，btn2印不出東西來，而btn就印的出來
是為什麼呢？
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