PHP！在一个php文件中怎么执行两个不同的insert语句

<?php <br />
session_start();<br />
include("Conn/conn.php");<br />
<br />
$ISBN=$_POST["ISBN"];<br />
$B_Name=$_POST["bookName"];<br />
$B_Author=$_POST["B_Author"];<br />
$B_Pub=$_POST["B_Pub"];<br />
$B_Author=$_POST["B_Author"];<br />
$B_BuyTime=date("Y-m-d");<br />
<br />
$B_Num=$_POST["B_Num"];<br />
$Content=$_POST["content"];<br />
echo $B_Num."<br>";//测试输出语句<br />
echo $Content;//测试输出语句<br />
$sql1=mysql_query("insert into book1(ISBN,B_Name,B_Author,B_Pub,B_BuyTime)values('$ISBN','$B_Name','$B_Author','$B_Pub','$B_BuyTime')");<br />
<br />
$sql2=mysql_query("insert into book2(B_Num,ISBN,Borrowed,Ordered,Introduction)values('$B_Num','$ISBN','否'，'否','$Content')");<br />
<br />
echo "<script language='javascript'>alert('图书信息添加成功!');history.back();location.href='book.php';</script>";<br />
?><br />
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">