i have used the VS login in tool in my webpage
then add the below into the webconfig
<connectionstrings>
<remove name="LocalSqlServer"></remove>
<add name="accconstr" connectionstring="Provider=Microsoft.Jet.OLEDB.4.0;Data Source=|DataDirectory|DB.mdb" providername="System.Data.OleDb"></add>
<add name="ADConnectionString" connectionstring="LDAP:SERVERNAME"></add>
</connectionstrings>
<system.web>
<identity impersonate="true" username="AD ADMIN USERNAME" password="AD ADMIN PASSWORD"></identity>
<membership defaultprovider="MembershipADProvider">
<providers>
<remove name="AspNetSqlMembershipProvider"></remove>
<add connectionstringname="ADConnectionString" attributemapusername="sAMAccountName" name="MembershipADProvider" type="System.Web.Security.ActiveDirectoryMembershipProvider, System.Web, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a"></add>
</providers>
</membership>
</system.web>
<authentication mode="Forms">
<forms loginUrl="login.aspx" protection="All" timeout="30" name="AppNameCookie" slidingExpiration="true" cookieless="UseCookies" enableCrossAppRedirects="false"/>
</authentication>
<authorization>
<deny users="?" />
<allow users="*" />
</authorization>