Modify Sharepoint Login UI

1. Enable Forms Based Authentication (FBA)

2.modify the default login page,which resides in C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\15\TEMPLATE\IDENTITYMODEL\LOGIN \default.aspx

modified code looks like:

<asp:Content ContentPlaceHolderId="PlaceHolderPageTitle" runat="server">
    <SharePoint:EncodedLiteral runat="server"  EncodeMethod="HtmlEncode" Id="ClaimsLogonPageTitle" />
</asp:Content>
<asp:Content ContentPlaceHolderId="PlaceHolderPageTitleInTitleArea" runat="server">
<!--sign in -->
    <SharePoint:EncodedLiteral runat="server"  EncodeMethod="HtmlEncode" Id="ClaimsLogonPageTitleInTitleArea" />
</asp:Content>
<asp:Content ContentPlaceHolderId="PlaceHolderMain" runat="server">
<!--Select the credentials  -->
<SharePoint:EncodedLiteral runat="server"  EncodeMethod="HtmlEncode" Id="ClaimsLogonPageMessage" />
<br />
<br />
<!--dropdownbox -->
<SharepointIdentity:LogonSelector ID="ClaimsLogonSelector" runat="server" visible="false" />
<a href="/_windows/default.aspx?ReturnUrl=">Login</a>
</asp:Content>

notes:

http://192.168.8.10:88/_windows/default.aspx?ReturnUrl=

http://192.168.8.10:88/_login/default.aspx