JavaScript 函数未定义错误（但已定义）

Question

新手上路，请多包涵

我有一个在模糊时触发的 JavaScript 函数。奇怪的是，它在我第一次运行时运行良好，从那以后我一直收到一个错误，提示 JavaScript 函数未定义 - 并且它停止运行。我用谷歌搜索过类似的问题，但没有一个建议能够解决这个问题。 Asp.Net 3.5 Webforms，如果重要的话。我已经包含了一些可能与问题无关的额外功能和代码行。我遇到的问题与大型函数 updateFiscalGrid 有关。绑定到事件的 HTML 位于函数下方。

 <%@ Page MasterPageFile="~/MasterPages/NPRPage.Master"  CodeBehind="NPRFundingApplication.aspx.cs" Inherits="Tea.Hcf.Web.Secured.NPRFundingApplication" AutoEventWireup="true" Language="C#" EnableEventValidation="true" MaintainScrollPositionOnPostback="true" %>

<%@ Register TagPrefix="ew" Namespace="eWorld.UI" Assembly="eWorld.UI" %>
<%@ Register TagPrefix="hcf" Namespace="Tea.Hcf.Web" Assembly="Tea.Hcf.Web" %>
<%@ Register Src="../Controls/NpCdnSearch.ascx" TagName="NpCdnSearch" TagPrefix="np1" %>
<%@ Register Src="../Controls/NpStudentRoster.ascx" TagName="NpStudentRoster" TagPrefix="np2" %>

 <script type="text/javascript" language="javascript">
    //<![CDATA[

    function showMaxWin(nUrl) {
        var h = 600;
        var w = 800;
        var features = 'resizable=1, width=' + w + ', height=' + h + ', top=0, left=0';
        NewWin = window.open(nUrl, 'NewWin', features);
    }

    function dateChangedCallback() {
        updateSubTotals();
    }

    function updateFiscalGrid(){
        var RelatedServicesCost = document.getElementById('<%= RPCB_SUPP_SVCS_SUBTOTAL3.ClientID %>').value;
        var ResidentialCare = document.getElementById('<%= RPCB_RES_SVCS_SUBTOTAL3.ClientID %>').value;
        var TotalCostforResPlacement = document.getElementById('<%= TotalResidentialPlacement.ClientID %>').value;
        var SetAside = document.getElementById('<%= rblSetAsideMet.ClientID %>').value;
        var LocalTaxSubtraction = document.getElementById('<%= LocalTaxShareSubtraction.ClientID %>').value;
        var IDEABRelatedServiceCost = document.getElementById('<%= RelatedServicesSetAside.ClientID %>').value;
        var IDEABDiscretionaryServicesCost = document.getElementById('<%= RelatedServicesDiscretionary.ClientID %>').value;
        var IDEABREsidentialCare = document.getElementById('<%= ResidentialCareSetAside.ClientID %>').value;
        var IDEABDiscResCare = document.getElementById('<%= ResidentialCareDiscretionary.ClientID %>').value;
        var StateFSP = document.getElementById('<%= TotalEducationServices2.ClientID %>').value;
        var Discretionary = document.getElementById('<%= DiscretionaryTotal.ClientID %>').value;
        var IDEABAward = document.getElementById('<%= IdeaBAward.ClientID %>').value;
        if(SetAside = '0'){
            Discretionary = LocalTaxSubtraction + IDEABRelatedServiceCost + IDEABDiscretionaryServicesCost + IDEABREsidentialCare + IDEABDiscResCare;
        }
        else {
            Discretionary = LocalTaxSubtraction + IDEABDiscretionaryServicesCost + IDEABDiscResCare;
        }
        IDEABAward = (RelatedServicesCost + ResidentialCare + TotalCostforResPlacement) - Number(Discretionary));
        //IDEABAward = (Number(RelatedServicesCost) + Number(ResidentialCare) + Number(TotalCostforResPlacement)) - Number(Discretionary));
        document.getElementById('<%= DiscretionaryTotal.ClientID %>').value = Discretionary;
        document.getElementById('<%= IdeaBAward.ClientID %>').value = IDEABAward;
    }

    //]]>
</script>

    <td>
        <hcf:CurrencyBox ID="LocalTaxShareSubtraction" OnBlur= "updateFiscalGrid();" Precision="2" runat="server" />
    </td>