使用value属性获取JavaScript中按钮的值。
您可以尝试运行以下代码来查找按钮的值-
<!DOCTYPE html>
<html>
<body>
<form id="myForm">
<button id="btn" type="button" value="my_button">My Button</button>
</form>
<script>
var str1 = document.getElementById("btn").innerHTML;
var str2 = document.getElementById("btn").value;
document.write("Button text: "+str1);
document.write("<br>Button value: "+str2);
</script>
</body>
</html>