为什么我的按钮点一下就消失了
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Math </title>
<script type="text/javascript">
function myrandom()
{
document.write(Math.round(Math.random()*10))
}
document.write(Math.round(Math.random()*10))
</script>
</head>
<body>
<form>
<input type="button" value="获取随机整数" onclick="myrandom()">
</form>
</body>
</html>
