Hi Steve!
I solve that problem without using javascript. To set the splitter's height equals to window use this code:
<html>
<head>
<style type="text/css">
*
{
border: 0;
margin: 0;
padding: 0;
}
html,body{
height:100%;
width:100%;
}
#content{
height: 100% /* here you can adjust size */
}
.split{
border:0; /* optionnal */
}
</style>
</head>
<body>
<form id="form1" runat="server">
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<div id="content">
<cc1:WebSplitter ID="WebSplitter1" runat="server" CssClass="split" Orientation="Horizontal" Height="100%">
<Panes>
<cc1:SplitterPane runat="server" MaxSize="112px" MinSize="0px" CollapsedDirection="PreviousPane">
<Template>
/* PANE 1 */
</Template>
</cc1:SplitterPane>
<cc1:SplitterPane runat="server">
<Template>
/* PANE 2 */
</Template>
</cc1:SplitterPane>
</Panes>
</cc1:WebSplitter>
</div>
</body>
the div will take all height that you will give to him and the websplitter will fill the div.
Mamat.