ASP.Net ITemplate - how do i read the raw content defined inside

Question

i have situation where in i would like to read the content of the ITemplate.

for example i have something like

<WD:PopUpPanel runat="server" ID="MyPoPUp">
<InitScript>
    // javascript
    document.getElementByID('urName').value = 'enter your name';
</InitScript>
<Content>
    Name:<asp:TextBox runat="Server" ID="urName"/>
</Content>
</WD:PopUpPanel>

basically the contents inside the InitScript is some javascript, which i want to use in ScriptManager.RegisterScript.

so my question is how do i define InitScript???

i tried

public ITemplate InitScript;

this gives me CompiledTemplateBuilder object, how do i read the content inside InitScript ???

thanks for reading, any help would be highly appreciated...