Need help with calculator!

Hello!

I could use some help with my calculator. It is suppossed to be exactly the same as the top one at www.ekonomikompassen.se. It’s a calculator for saving money.
I have done everything I can with it and I can’t figure out how to solve the problems!

Here is the .fla (76.5 kB) http://www.mediafire.com/file/z4wq4imario/sparverktyg.fla

Help would be much appreciated!

stop();
currentDate = new Date();
var months = new Array();
months[0] = "Januari";
months[1] = "Februari";
months[2] = "Mars";
months[3] = "April";
months[4] = "Maj";
months[5] = "Juni";
months[6] = "Juli";
months[7] = "Augusti";
months[8] = "September";
months[9] = "Oktober";
months[10] = "November";
months[11] = "December";


current_month = currentDate.getMonth();
end_year = currentDate.getFullYear();
end_day = currentDate.getDate();
    
onEnterFrame = function()
{
    var_kvar = Number(_root.var_ss) - Number(_root.var_sk);
    var_spar = Number(mySlider.ratio);
    save_months = Math.ceil((var_ss - var_sk) / var_spar);
    done_year.text = end_year;

    if (var_kvar < 0)
    {
        var_kvar = "0";
    } //end if
    else
    {
        var_kvar = Number(_root.var_ss) - Number(_root.var_sk);
    } //end else
    
    end_month = current_month + save_months;
    done_month.text = months[end_month];  
    
    ins_ss.onChanged = ins_sk.onChanged = mySlider.onChanged = function()
    {
        while (end_month > 11) 
        {
        end_month = end_month -11;
        end_year++;
        }//end while
    }//end while function
}//end function

    done_year.text = end_year+end_month;

var var_ns:String = "Skriv namn här";

    ins_ns.onSetFocus = function() {
    if (ins_ns.text == "Skriv namn här") {
    ins_ns.text = "";
    ins_ns.textColor = 0xff2c00;
    }else {
    }
}

ins_ns.onKillFocus = function() {
    if (ins_ns.text == "") {
        ins_ns.text = "Skriv namn här";
        ins_ns.textColor = 0xFF8E77;
    }else {
    }
}



ins_ss.onSetFocus = function() {
    ins_ss.textColor = 0xff2c00;
}

ins_ss.onChanged = function() {
    if (ins_ss.text == "") {
        ins_ss.text = "0";
    }else {
        ins_ss.text = ins_ss.text = ins_ss.text;
    }
}


ins_sk.onSetFocus = function() {
    ins_sk.textColor = 0xff2c00;
}

ins_sk.onChanged = function() {
    if (ins_sk.text == "") {
        ins_sk.text = "0";
    }else {
        ins_sk.text = ins_sk.text = ins_sk.text;
    }
}