Our base Masterpage has something like the following
<head runat="server">
<title></title>
<script type="text/javascript" src="<%= Page.ResolveClientURL("~/javascript/actions.js")%>"></script>
<script type="text/javascript" src="<%= Page.ResolveClientURL("~/javascript/jquery/jquery-1.2.6.min.js")%>"></script>
<asp:contentplaceholder id="cph_htmlhead" runat="server">
</asp:contentplaceholder>
</head>
If this Masterpage is the Masterpage for an ASPX page things work fine.
If this Masterpage is the Masterpage for a child Masterpage and then a new ASPX page uses the child Masterpage as it's MasterPage we see:
Server Error in '' Application.
The Controls collection cannot be modified because the control contains code blocks (i.e. <% ... %>).
What is the preferred way to include global resources (Javascript/CSS) in a base Masterpage preserving tilde(~) style relative pathing?
Use the ScriptManager server control:
<asp:ScriptManager ID="myScriptManager" runat="server">
<Scripts>
<asp:ScriptReference Path = "~/javascript/actions.js" />
<asp:ScriptReference Path = "~/javascript/jquery/jquery-1.2.6.min.js" />
</Scripts>
</asp:ScriptManager>
Have you tried:
<script type="text/javascript" src='<%= Page.ResolveClientUrl("~/javascript/actions.js") %>'></script>
As per ScottGu,
One tip to take advantage of is the relative path fix-up support provided by the head runat="server" control. You can use this within Master Pages to easily reference a .CSS stylesheet that is re-used across the entire project (regardless of whether the project is root referenced or a sub-application):
The path fix-up feature of the head control will then take the relative .CSS stylesheet path and correctly output the absolute path to the stylesheet at runtime regardless of whether it is a root referenced web-site or part of a sub-application.
来源：https://stackoverflow.com/questions/183859/preferred-way-to-include-relative-reference-to-javascript-in-vs-2008-nested-mast