var password1 = "";
function validatePassword(sender, args)
{
    if(args.Value.length < 4){
        args.IsValid = false;
    }
    else{
        password1 = args.Value;
        args.IsValid = true;
    }
}

function validatePassword2(sender, args)
{
    if(password1 == args.Value){
        args.IsValid = true;
    }
    else{
        args.IsValid = false;
    }
}