请问我这个为什么什么都出不来呢
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>无标题文档</title>
</head>
<body>
<script type="text/javascript">
var main = document.body;
//创建链接
function createa(url,text)
{
var A=document.createElement('a')
A.setAttribute('href',url)
A.innnerHTML=text
A.style.color="red"
return A
}
// 调用函数创建链接
main.appendChild(createa("http://www.imoov.com","慕课网"))
</script>
</body>
</html>
