这也有错？帮帮忙吧！马上结帐

可以贴出你的程序
我想问题不是出在这里的
另外，Code1=null的写法是否有问题，请检查！

各位兄弟：程序贴出来了，希望实现的功能是输入产品代码，失去光标自动显示产品信息，输入数量后，自动计算总价，同时自动产生一个新的空行。各位大侠，帮帮忙吧，我没分了，多谢。

<%@ page contentType="text/html;charset=gb2312"%>
<jsp:useBean id="bean0" scope="session" class="TpEpms.ejb.OrderDetailClient" />
<jsp:useBean id="person" scope="session" class="TpEpms.ejb.PersonalClient" />
<jsp:useBean id="order" scope="session" class="TpEpms.ejb.OrdersClient" />
<jsp:useBean id="cust" scope="session" class="TpEpms.ejb.CustomerClient" />
<jsp:useBean id="product" scope="session" class="TpEpms.ejb.ProductClient" />
<HTML>
<style type="text/css">
.title
{FONT-SIZE:9pt;
background-color: #CCCCFF;
BORDER-RIGHT: #6B0029 1px solid;
BORDER-TOP: #E677B9 1px solid;
BORDER-LEFT: #E677B9 1px solid;
BORDER-BOTTOM: #6B0029 1px solid;
height: 18px;
COLOR=#000000"
<%--cursor: default;--%>
}
</style>
<HEAD>
<TITLE> add order</TITLE>
</HEAD>
<BODY>
<H2><FONT size="5" color="#000099" face="新宋体"><TT><U>销售订单</U></TT></FONT></H2>
<TABLE width="700" style="background-image : url(img/background.gif);">
<TR>
<TD width="88" height="8" style="FONT-SIZE:9pt;background-color: #CCCCFF; BORDER-RIGHT: #6B0029 1px solid; BORDER-TOP: #E677B9 1px solid; BORDER-LEFT: #E677B9 1px solid; BORDER-BOTTOM: #6B0029 1px solid;height: 18px; COLOR=#000000">订单日期</TD>
<TD style="color: rgb(0,128,255); border-left: medium none; border-right: medium none; border-top: medium none; border-bottom: 1pt solid rgb(5,5,5)" align="center" width="146">
<script language="JavaScript">
today=new Date();
function initArray(){
this.length=initArray.arguments.length
for(var i=0;i<this.length;i++)
this[i+1]=initArray.arguments[i]  }
document.write("<font color=blue>",today.getYear(),"<font color=blue>年","<font color=blue>",today.getMonth()+1,"<font color=blue>月","<font color=blue>",today.getDate(),"<font color=blue>日 </FONT>"," ");</script></TD>
<TD width="68" height="8" style="FONT-SIZE:9pt;background-color: #CCCCFF; BORDER-RIGHT: #6B0029 1px solid; BORDER-TOP: #E677B9 1px solid; BORDER-LEFT: #E677B9 1px solid; BORDER-BOTTOM: #6B0029 1px solid;height: 18px; COLOR=#000000">订单编号</TD>
<TD width="191"><INPUT TYPE="text" size="20" NAME="" value="" style="color: rgb(24,9,255); border-left: medium none; border-right: medium none; border-top: medium none; border-bottom: 1pt solid rgb(5,5,5)"></TD>
</TR>
<TR>
<TD width="88" height="8" style="FONT-SIZE:9pt;background-color: #CCCCFF; BORDER-RIGHT: #6B0029 1px solid; BORDER-TOP: #E677B9 1px solid; BORDER-LEFT: #E677B9 1px solid; BORDER-BOTTOM: #6B0029 1px solid;height: 18px; COLOR=#000000">客户编号</TD>
<TD width="146"><INPUT TYPE="text" size="20" NAME="" style="color: rgb(24,9,255); border-left: medium none; border-right: medium none; border-top: medium none; border-bottom: 1pt solid rgb(5,5,5)"></TD> <TD width="68" height="8" style="FONT-SIZE:9pt;background-color: #CCCCFF; BORDER-RIGHT: #6B0029 1px solid; BORDER-TOP: #E677B9 1px solid; BORDER-LEFT: #E677B9 1px solid; BORDER-BOTTOM: #6B0029 1px solid;height: 18px; COLOR=#000000">销售员</TD>
<TD width="191"><INPUT TYPE="text" size="20" NAME="" style="color: rgb(24,9,255); border-left: medium none; border-right: medium none; border-top: medium none; border-bottom: 1pt solid rgb(5,5,5)"> </TD>
</TR>
</TABLE>
<%
int num,i;
  num=(new Integer(request.getParameter("itemNum").toString())).intValue();
  num++;
%>
<form action="orderadd.jsp" method="post" id="add">
<input type="hidden" id="itemNum" name="itemNum" value="<%=num%>">
<div class="title" align="left" nowrap="true">
  <TABLE border="0" cellspacing="1" cellpadding="1" width="80%">
    <tr>
      <Th  height="8" width="70">商品编号</Th>
      <Th  height="8" width="70">商品名称</Th>
      <Th  width="70" height="8">商品单价</Th>
      <Th  width="70" height="8">数量</Th>
      <Th  width="70" height="8">金额</Th>
   </tr>
<%
String Code1;
String Code2;
String Num1;for(i=0;i<(num-1);i++){
Num1 = "proNum" + ((new Integer(i)).toString());
Code2 = "proCode" + ((new Integer(i)).toString());
Code1=request.getParameter(Code2);
product.findByPrimaryKey(Code1);
%>
<tr>
   <td align=center width="70"><input size=10 type="text" id="proCode<%=i%>" name="proCode<%=i%>"  value=<%=product.getSProdCode()%> onblur="isValid(form)"> </td>
   <td align=center width="70" size=10><%=product.getSProdName()%></td>
   <td align=center width="70"><%=product.getMProdPrice()%></td>
   <td align=center width="70"><input size=10 type="text" id="proNum<%=i%>" name="proNum<%=i%>" value="<%=request.getParameter(Num1)%>" onblur="isValid1(form)"> </td>
   <td align=center width="70"><%=product.getMProdPrice()%>*<%=request.getParameter(Num1)%></td>
</tr>
<%}
if(!(Code1=null)){
%>
<tr>
   <td align=center width="70"><input size=10 type="text" id="proCode<%=i%>" name="proCode<%=i%>" onblur="isValid(form)"> </td>
   <td align=center width="70"></td>
   <td align=center width="70"></td>
   <td align=center width="70"><input size=10 type="text" id="proNum<%=i%>" name="proNum<%=i%>" onblur="isValid1(form)"> </td>
   <td align=center width="70"></td>
</tr>
<%}%>
</TABLE>
</DIV>
</form>
</BODY>
</HTML>
<script language="javascript">
function isValid(form)
  {
  if(form.proCode<%=i%>.value==""){
  alert("don't null!");
  return false;}  add.submit();
}
function isValid1(form)
{
if(form.proNum<%=i%>.value==""){
  alert("please input quantity or no this product!");
  return false;}
  if(form.proNum<%=i%>.value=="0"){
  alert("please input quantity or no this product!");
  return false;}
  add.submit();
}
</script>

if (!(code1 == null)) {

1、 you may define the argument like this: String Code1 = null;2、 why not write the selection sentence like this : if(Code1 != null) ?

if (!(code1 == null)) {

黄黄说的对，要先把eode1初试化！ : String Code1 = null

agree with hyhong_h(黄黄)

调试易

这也有错？帮帮忙吧！马上结帐

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