代码编辑器：
x
1
<script>2
function displayResult(){3
var x=document.getElementById("button1").type;4
alert(x);5
}6
</script>7
<form>8
<input type="button" onclick="displayResult()" value="显示按钮类型" id="button1">9
</form>10
<script>function displayResult(){ var x=document.getElementById("button1").type; alert(x);}</script><form><input type="button" onclick="displayResult()" value="显示按钮类型" id="button1"></form>