为什么放入div中的submit按钮触发的onclick的js中window.location.href = "http://www.baidu.com";无效，而window.open("http://www.qq.com", "_blank");有效呢？我想网页重定向，应该怎么改呢？
以下是HTML代码：
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>跳转</title>
</head>
<script type="text/javascript">
function jstiaozhuan() {
window.location.href = "http://www.baidu.com";
window.open("http://www.qq.com", "_blank");
}
</script>
<body>
<div id="formContainer">
<form id ="aa" method="ttt">
<input type="submit" name="submit" value="跳转" onclick="jstiaozhuan()" value="sign">
</form>
</div>
</body>
</html>
