hi
I added some css for page, LeftMenu and Content
please check
<head id="Head1" runat="server">
<title>Untitled Page</title>
<asp:contentplaceholder id="head" runat="server" xmlns:asp="#unknown">
</asp:contentplaceholder>
<style>
#wraper
{
width: 100%;
padding: auto;
margin: auto;
}
#leftMenu
{
width: 40%;
float: left;
padding: auto;
margin: auto;
}
#Content
{
width: 60%;
float: right;
padding: auto;
margin: auto;
}
</style>
</head>
<body>
<form id="form1" runat="server">
<asp:scriptmanager id="ScriptManager1" runat="server" xmlns:asp="#unknown">
</asp:scriptmanager>
<div id="wraper">
<table width="100%">
<tr>
<td>
<asp:label id="lblUsername" runat="server" text="Label" xmlns:asp="#unknown"></asp:label>
</td>
<td style="width: 100px;" align="right">
<asp:linkbutton id="lnkLogOut" runat="server" onclick="lnkLogOut_Click" causesvalidation="False" xmlns:asp="#unknown">Log Out</asp:linkbutton>
</td>
</tr>
</table>
<div id="leftMenu">
<asp:panel id="pn_SuperAdmin" runat="server" xmlns:asp="#unknown">
<table>
<tr>
<td valign="top" bgcolor="#eeeeee">
<asp:menu id="Menu_SUPER_ADMIN" runat="server">
<items>
<asp:menuitem navigateurl="~/myAccount.aspx" text="Home" tooltip="Click to go on MY ACCOUNT page">
Value="Home"></asp:menuitem>
<asp:menuitem text="Add Client" value="Add Client" navigateurl="~/Add_New_Client.aspx">
</asp:menuitem>
<asp:menuitem text="Edit Client" value="Edit Client" navigateurl="~/edit_Client_Info.aspx">
ToolTip="Click here to edit existing Client's Personal Information"></asp:menuitem>
<asp:menuitem text="Change Password" value="Change Password" navigateurl="~/change_password.aspx">
ToolTip="Click here to change your Password"></asp:menuitem>
<asp:menuitem navigateurl="~/Add_Edit_Normal_Admin.aspx" text="Add/Edit Normal Admin">
ToolTip="Click here to add Normal Admin" Value="Add/Edit Normal Admin"></asp:menuitem>
<asp:menuitem></asp:menuitem>
<asp:menuitem navigateurl="~/Add_Edit_Super_Admin.aspx" text="Add/Edit Super Admin">
Value="Add/Edit Super Admin"></asp:menuitem>
<asp:menuitem text="Create Query" tooltip="Click here to Create Query for Offline Data">
Value="Create Query" NavigateUrl="~/Query_For_Admin.aspx"></asp:menuitem>
</items>
</asp:menu>
</td>
</tr>
</table>
</asp:panel>
<asp:panel id="pn_NormalAdmin" runat="server" xmlns:asp="#unknown">
<table>
<tr>
<td>
<asp:menu id="Menu_NORMAL_ADMIN" runat="server">
<items>
<asp:menuitem navigateurl="~/myAccount_Admin.aspx" text="Home" tooltip="Click to go on MY ACCOUNT page">
Value="Home"></asp:menuitem>
<asp:menuitem text="Add Client" value="Add Client" navigateurl="~/Add_New_Client.aspx">
</asp:menuitem>
<asp:menuitem text="Edit Client" value="Edit Client" navigateurl="~/edit_Client_Info.aspx">
ToolTip="Click here to edit existing Client's Personal Information"></asp:menuitem>
<asp:menuitem text="Change Password" value="Change Password" navigateurl="~/change_password.aspx">
ToolTip="Click here to change your Password"></asp:menuitem>
<asp:menuitem text="Create Query" tooltip="Click here to create Query for Offline Data">
Value="Create Query" NavigateUrl="~/Query_For_Admin.aspx"></asp:menuitem>
</items>
</asp:menu>
</td>
</tr>
</table>
</asp:panel>
<asp:panel id="pn_CLEINT" runat="server" xmlns:asp="#unknown">
<table>
<tr>
<td>
<asp:menu id="Menu_CLEINT" runat="server">
<items>
<asp:menuitem text="Change Password" value="Change Password" navigateurl="~/change_password.aspx">
ToolTip="Click here to change your Password"></asp:menuitem>
</items>
</asp:menu>
</td>
</tr>
</table>
</asp:panel>
</div>
<div id="Content">
<asp:contentplaceholder id="ContentPlaceHolder1" runat="server" xmlns:asp="#unknown">
</asp:contentplaceholder>
</div>
</div>
</form>
</body>
</head>