Popup in button click

See more:

MVC4

in my controller i have:
public ActionResult UserListing()
{
DataTable dt = new DataTable();
dt=sampleDal.UserRetrieve();
return PartialView(ConvertDataTabletoIEnumerable(dt));
}

private IEnumerable ConvertDataTabletoIEnumerable(DataTable dataTable)
{
foreach (DataRow row in dataTable.Rows)
{
yield return new Sample
{
Name=row["Name"].ToString(),
UserName = row["UserName"].ToString()
};
}
}


And in View

@using (Html.BeginForm("AddUser", "Sample", FormMethod.Post))
{
<input type="submit" id="adduser" value="Add New User" style="color:gray; border-bottom-style:solid; border-right-style:solid; margin-left:1100px;" />
}




when i click on Add New user a popup should appear to enter new user
please suggest me the code for that