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How to reference JavaScript code in MasterPage from within another aspx page

Simple question: How do I refer to JavaScript code on a Master page file, (which is also on the same folder as many other ASPX pages), from one of my ASPX pages?

Master Page

    <%@ Master Language="C#" AutoEventWireup="true" CodeFile="JobRegister.master.cs" Inherits="JobRegister_Job" %>

    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

    <html xmlns="http://www.w3.org/1999/xhtml" >
    <head runat="server">
        <title>Tec-NQ miJob Register</title>
        <style type="text/css">
        textarea { font-family: Arial; font-size: 10pt; }
        a { white-space: nowrap; }
        .tablestyle { background-color:#eeeeee; width:100%; margin-bottom:2px; padding:3px; }
        .checkboxlist input { position:relative; left: 360px; }
        .checkboxlist label { position:relative; left: -22px; }
        .hidepanel { display: none; }
        .showpanel { display: block; }
        </style>

        <script src="<%# ResolveUrl("~/") %>" type="text/javascript">
            /*
                Added : Variables required for image uploading & validation checking.
                By : Amit Champaneri
                On : 4th April 2008
            */
            var hoverColor = "#00000b"; //DIV Color when mouse is hover the DIV
            var defaultColor = "black"; //DIV default color
            var selectColor = "#000000"; // DIV color when its selected.
            var selectedDIV = "";        //ID of the DIV user has currently selected(it will be 1,2,3 or 4)                
            var objActiveX; //Object of Clipboard ActiveX control.
..
..etc..

My ASPX page has a reference to the Javascripts in the Master Page ...

ASPX page

<%@ Page Language="C#" MasterPageFile="~/JobRegister/JobRegister.master" AutoEventWireup="true" CodeFile="Details.aspx.cs" Inherits="JobRegister_Details" %>
<%@ Register TagPrefix="tecnq" TagName="JobAction" Src="ActionControl.ascx" %>
<asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
    <asp:FormView ID="FormView1" runat="server" DataSourceID="SqlDataSource1" DataKeyNames="JobID, CreatedBy" GridLines="None" 
        AllowPaging="True" DefaultMode="Edit" OnDataBound="FormView1_OnDataBound" OnItemCreated="FormView1_OnItemCreated"
        OnItemUpdated="FormView1_OnItemUpdated" OnItemUpdating="FormView1_Updating"
        HeaderText="Job Details" CellPadding="0" Font-Names="Arial" Font-Size="10pt">
        <HeaderStyle BackColor="#5D7B9D" ForeColor="White" Font-Bold="True" HorizontalAlign="Center" Height="30px" />
        <InsertItemTemplate>
...
..etc..
...
<img id="imgPaste1" src="Images/imgPaste.gif" class="LinkImage" title="Click here to Paste any copied Image" onclick="javascript:pasteOnClick('1');" />
..
..etc..
..

I got all this from a great blog on how to paste clipboard IMAGEs into a web form ...

http://www.codeproject.com/Articles/25967/Clipboard-ActiveX-for-Image-Copy-Paste-into-Web-Fo

The demo in the above blog works great, but both the Javascript and the ASPX code are all inside the same file!

How can I do the same with the Javascript in the MasterPage and have references to the scripts in my ASPx file?

I tried also to place all the code inside just my ASPX file but I get an invalid reference error on this line of code ...

document.getElementById("<%=hdnImageFileName1.ClientID %>").value = "";

It's saying it cannot find a reference to "hdnImageFileName1", but I know it's in my ASPX page further down ...

ie

<asp:HiddenField runat="server" ID="hdnImageFileName1" />

Thanks in advance.

Solution

  • The answer was like @deostroll said. I moved all my JS code into a custom.js file and referenced it simply via markup. Simple. Done! Thank you