为什么会出现Microsoft VBScript 编译器异常 800a0400'缺少语句的异常

为什么会出现Microsoft VBScript 编译器错误 800a0400'缺少语句的错误？
Microsoft VBScript 编译器错误 '800a0400' 

缺少语句 

\wwwroot\student.asp, line 49
下面是源码：
<%@ language="VBScript" %>
<%
t1 = Request.Form("T1") 
t2 = Request.Form("T2")
t3 = Request.Form("T3")
t4 = Request.Form("T4") 
t5 = Request.Form("T5")
t6 = Request.Form("T6") 
t7 = Request.Form("T7")  
if t1="" OR t2="" OR t5="" then Response.Write "有必填数据没有填写!" else  
set xmldoc = server.createObject("MSXML.DOMDocument") 
xmldoc.async = "false" 
xmldoc.load(server.mappath("studentInfor.xml")) 
set root = xmldoc.DocumentElement 
set newNode1 = xmldoc.CreateElement("student")
root.AppendChild(newNode1) 

set newNode2 = xmldoc.CreateElement("SN") 
newNode1.AppendChild(newNode2) 
newNode2.text = t1 
set newNode2 = xmldoc.CreateElement("Name") 
newNode1.AppendChild(newNode2) 
newNode2.text = t2 

set attrNode=xmldoc.CreateAttribute("sex")

newNode2.setAttributeNode(attrNode)
attrNode.text="T6"

set attrNode=xmldoc.CreateAttribute("birth")

newNode2.setAttributeNode(attrNode)
attrNode.text="T7"

newNode1.AppendChild(newNode2)
set newNode2 = xmldoc.CreateElement("Class")

newNode1.AppendChild(newNode2) 
newNode2.text = t3 
set newNode2 = xmldoc.CreateElement("Tel") 
newNode1.AppendChild(newNode2) 
newNode2.text = t4 
set newNode2 = xmldoc.CreateElement("Email")
newNode1.AppendChild(newNode2) 
newNode2.text = t5  
xmldoc.save(server.mappath("student.xml"))
set xmldoc = nothing 
Response.Write"客户数据已成功添加!" 
end if //这里是49行
%>

[解决办法]

VBScript code

<%t1 = Request.Form("T1")  t2 = Request.Form("T2")t3 = Request.Form("T3")t4 = Request.Form("T4")  t5 = Request.Form("T5")t6 = Request.Form("T6")  t7 = Request.Form("T7")   if t1="" OR t2="" OR t5="" Then    Response.Write "有必填数据没有填写!"else    set xmldoc = server.createObject("MSXML.DOMDocument")      xmldoc.async = "false"      xmldoc.load(server.mappath("studentInfor.xml"))      set root = xmldoc.DocumentElement      set newNode1 = xmldoc.CreateElement("student")    root.AppendChild(newNode1)          set newNode2 = xmldoc.CreateElement("SN")      newNode1.AppendChild(newNode2)      newNode2.text = t1      set newNode2 = xmldoc.CreateElement("Name")      newNode1.AppendChild(newNode2)      newNode2.text = t2          set attrNode=xmldoc.CreateAttribute("sex")        newNode2.setAttributeNode(attrNode)    attrNode.text="T6"        set attrNode=xmldoc.CreateAttribute("birth")        newNode2.setAttributeNode(attrNode)    attrNode.text="T7"        newNode1.AppendChild(newNode2)    set newNode2 = xmldoc.CreateElement("Class")        newNode1.AppendChild(newNode2)      newNode2.text = t3      set newNode2 = xmldoc.CreateElement("Tel")      newNode1.AppendChild(newNode2)      newNode2.text = t4      set newNode2 = xmldoc.CreateElement("Email")    newNode1.AppendChild(newNode2)      newNode2.text = t5       xmldoc.save(server.mappath("student.xml"))    set xmldoc = nothing      Response.Write"客户数据已成功添加!"  end If%>
------解决方案-------------------- 
 
VBScript code
<%@ language="VBScript" %><%t1 = Request.Form("T1")  t2 = Request.Form("T2")t3 = Request.Form("T3")t4 = Request.Form("T4")  t5 = Request.Form("T5")t6 = Request.Form("T6")  t7 = Request.Form("T7")   if t1="" OR t2="" OR t5="" then    Response.Write "有必填数据没有填写!"else       set xmldoc = server.createObject("MSXML.DOMDocument")      xmldoc.async = "false"      xmldoc.load(server.mappath("studentInfor.xml"))      set root = xmldoc.DocumentElement      set newNode1 = xmldoc.CreateElement("student")    root.AppendChild(newNode1)      set newNode2 = xmldoc.CreateElement("SN")      newNode1.AppendChild(newNode2)      newNode2.text = t1      set newNode2 = xmldoc.CreateElement("Name")      newNode1.AppendChild(newNode2)      newNode2.text = t2      set attrNode=xmldoc.CreateAttribute("sex")    newNode2.setAttributeNode(attrNode)    attrNode.text="T6"    set attrNode=xmldoc.CreateAttribute("birth")    newNode2.setAttributeNode(attrNode)    attrNode.text="T7"    newNode1.AppendChild(newNode2)    set newNode2 = xmldoc.CreateElement("Class")    newNode1.AppendChild(newNode2)      newNode2.text = t3      set newNode2 = xmldoc.CreateElement("Tel")      newNode1.AppendChild(newNode2)      newNode2.text = t4      set newNode2 = xmldoc.CreateElement("Email")    newNode1.AppendChild(newNode2)      newNode2.text = t5       xmldoc.save(server.mappath("student.xml"))    set xmldoc = nothing      Response.Write"客户数据已成功添加!"  end if //这里是49行%>