大神看看我这代码哪里出了问题？？？

源自：7-16 随机数 random()

大神看看我这代码哪里出了问题？？？

<!DOCTYPE html>

<html>

<head>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

<title>Math </title>

<script type="text/javascript">

var i=Math.random()*10;

document.getElementsByTagName("button")[0].onclick=function(){

document.getElementsByTagName("button")[0].innerHTML=round(i)

}

</script>

</head>

<body>

<button>点击</button>

</body>

</html>

为什么点击没有变化呢

提问者：gangsterJ4229053 2016-12-16 10:47

个回答

ThomasYao

2016-12-16 11:05:40

已采纳

<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Math </title>
<script type="text/javascript">

function func_click()
{
    var i=Math.random()*10;

    var myobj = document.getElementsByTagName("button")[0];
    //var myobj = document.getElementById("button");
    myobj.innerHTML = i;
    document.write(myobj.innerHTML);

}

</script>
</head>
<body>
<button id="button" onclick="func_click()">点击</button>
</body>
</html>

0
ThomasYao

2016-12-16 11:08:25

If I were you I will split such function into sortable steps...

0
a2020883119

2016-12-16 10:59:56

button不是名字
<button id="xxxx" name="xxxx" class="xxxx">点击</button>
document.getElementsByTagName("xxxx")[0].onclick=function(){

0