asp ajax注册验证之 防止用户名输入空格

<%
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Function ReplaceText(fString,patrn,replStr)
    Set regEx = New RegExp     ' 建立正则表达式。
        regEx.Pattern = patrn ' 设置模式。
        regEx.IgnoreCase = True ' 设置是否区分大小写。
        regEx.Global = True ' 设置全局可用性。
        ReplaceText = regEx.Replace(""&fString&"",""&replStr&"") ' 作替换。
    Set regEx=nothing
End Function
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Function HTMLEncode(fString)
    fString=Trim(fString)
    fString=Replace(fString,CHR(9),"")
    fString=Replace(fString,CHR(13),"")
    fString=Replace(fString,CHR(22),"")
    fString=Replace(fString,CHR(38),"&")    '“&”
    fString=Replace(fString,CHR(32)," ")    '“ ”
    fString=Replace(fString,CHR(34),""")    '“"”
    fString=Replace(fString,CHR(37),"%")    '“%”
    fString=Replace(fString,CHR(39),"'")    '“'”
    fString=Replace(fString,CHR(42),"*")    '“*”
    fString=Replace(fString,CHR(43),"+")    '“+”
    fString=Replace(fString,CHR(44),",")    '“,”
    fString=Replace(fString,CHR(45)&CHR(45),"--")    '“--”
    fString=Replace(fString,CHR(92),"\")    '“\”
    'fString=Replace(fString,CHR(95),"_")    '“_”
    fString=Replace(fString,CHR(40),"(")    '“(”
    fString=Replace(fString,CHR(41),")")    '“)”
    fString=Replace(fString,CHR(60),"<")    '“<”
    fString=Replace(fString,CHR(62),">")    '“>”
    fString=Replace(fString,CHR(123),"{")    '“{”
    fString=Replace(fString,CHR(125),"}")    '“}”
    fString=Replace(fString,CHR(59),";")    '“;”
    fString=Replace(fString,CHR(10),"<br>")