<form name="company" method="post" action="company.insert.php" onsumit="false">
==>>
<form name="company" method="post" action="company.insert.php" onsubmit="return false">
==>>
<form name="company" method="post" action="company.insert.php" onsubmit="return false">
其中check(this)返回的值已经是false.
这样才能返回还有onsumit是不是你打错了阿