有用的无声递交表单的客户端函数

<SCRIPT LANGUAGE="vbScript">
dim i,strReturn
function xmlhttp_submit(form_object,url)
alert("")
for i = 0 to form_object.elements.length-1
set elem = form_object.elements(i)
form_value=form_value & URLEncoding(elem.name) & "=" & URLEncoding(elem.value) &"&"
Next

set xmlhttp = CreateObject("Microsoft.XMLHTTP")
xmlhttp.open "POST",url,false
xmlhttp.setRequestHeader "CONTENT-TYPE","application/x-www-form-urlencoded"

xmlhttp.send(form_value)
ysinfo.innerHTML=form_value
msg.innerHTML=xmlhttp.ResponseText
end function
上面这段代码遍历了form里的对象，组装出form_value字串，然后通过send()方法以POST方式(不受长度限制)发送给服务器端。
又是经典的中文编码问题，需要加多一个URLEncoding函数把变量值的字符串编成UTF-8格式，也因此要采用自己不熟悉的VBScript来写form_submit() 。

Function URLEncoding(vstrIn)

strReturn = ""

For i = 1 To Len(vstrIn)
ThisChr = Mid(vStrIn,i,1)
If Abs(Asc(ThisChr)) < &HFF Then
strReturn = strReturn & ThisChr
Else
innerCode = Asc(ThisChr)
If innerCode < 0 Then
innerCode = innerCode + &H10000
End If
Hight8 = (innerCode And &HFF00) &HFF
Low8 = innerCode And &HFF
strReturn = strReturn & "%" & Hex(Hight8) & "%" & Hex(Low8)
End If
Next
URLEncoding = strReturn
End Function

</SCRIPT>