/**
 * 储蓄存款计算器
 * author: xiaohong.liu
 * date: 2008-9-11 
 */

var intervaldays;   //存款天数
var savingmoney;    //存款总金额
var interestrate;   //年利率
var accrualtaxrate  //利息税率
var savingkind;     //存款种类
var savingterm;     //存款期限
var dayscale = 1.00;  //日期尺度
var monthscale = 12.00;//月期尺度


//初始化计算器
function initsaving() {

    document.getelementbyid("saving_startdate").value = gettodaydate();
    document.getelementbyid("saving_enddate").value = gettodaydate();


    document.getelementbyid("moneyname").innerhtml = "";
    document.getelementbyid("moneyname").options.add(new option("--请选择--", "0"));
    for (var i = 0; i < savingmoneyarr.length; i++) {
        document.getelementbyid("moneyname").options.add(new option(savingmoneyarr[i][1], savingmoneyarr[i][0]));
    }
}

/**
 * 计算存款利息
 */
function calculatesaving() {
    if (document.getelementbyid("moneyname").value == "0") {
        alert("请选择货币种类");
        document.getelementbyid("moneyname").focus();
        return false;
    }
    if (document.getelementbyid("savingkind").value == "0") {
        alert("请选择存款种类");
        document.getelementbyid("savingkind").focus();
        return false;
    }
    if (document.getelementbyid("savingterm").value == "0") {
        alert("请选择存款期限");
        document.getelementbyid("savingterm").focus();
        return false;
    }

    if (document.getelementbyid("saving_startdate").value > document.getelementbyid("saving_enddate").value) {
        alert("请正确输入起始日期和终止日期！");
        return false;
    }

    intervaldays = getintervaldays(document.getelementbyid("saving_startdate").value, document.getelementbyid("saving_enddate").value);



    intervaldays = parseint(intervaldays);
    if (intervaldays <= 0) {
        alert("请正确输入起始日期和终止日期！");
        return false;
    }




    document.getelementbyid("savingdays").value = intervaldays;
    savingmoney = getsavingmoney();
    savingmoney = parsefloat(savingmoney);
    if (!savingmoney > 0) {
        alert("请输入正确的存款金额！");
        document.getelementbyid("savingmoney").focus();
        return false;
    }
    interestrate = getinterestrate();
    interestrate = parsefloat(interestrate);
    if (interestrate == 0) {
        alert("请输入正确的年利率！");
        document.getelementbyid("interestrate").focus();
        return false;
    }
    accrualtaxrate = getaccrualtaxrate();
    if (accrualtaxrate == -1) {
        alert("请输入正确的利息税率！");
        document.getelementbyid("accrualtaxrate").focus();
        return false;
    }
    savingkind = document.getelementbyid("savingkind").options[document.getelementbyid("savingkind").selectedindex].innertext;


    var totalaccrual;      //利息总额
    var totaltax;          //利息税额
    var gainedaccrual;     //实得利息
    var summation;         //本息合计
    var mensalaccrual = 0.00;//每月利息
    if (savingkind == "整存整取") {
        totalaccrual = savingmoney * (interestrate / 100.00) * dayscale;
        totalaccrual = formatfloat(totalaccrual, 2);
        totaltax = totalaccrual * (accrualtaxrate / 100.00);
        totaltax = formatfloat(totaltax, 2);
        gainedaccrual = totalaccrual - totaltax;
        gainedaccrual = formatfloat(gainedaccrual, 2);
        summation = gainedaccrual + savingmoney;
        summation = formatfloat(summation, 2);

    } else if (savingkind == "零存整取") {
        totalaccrual = savingmoney * (interestrate / (12 * 100.00)) * (1 + monthscale) * monthscale / 2;
        totalaccrual = formatfloat(totalaccrual, 2);
        totaltax = totalaccrual * (accrualtaxrate / 100.00);
        totaltax = formatfloat(totaltax, 2);
        gainedaccrual = totalaccrual - totaltax;
        gainedaccrual = formatfloat(gainedaccrual, 2);
        summation = gainedaccrual + savingmoney * monthscale;
        summation = formatfloat(summation, 2);
    } else if (savingkind == "存本取息") {
        totalaccrual = savingmoney * (interestrate / 100.00);
        totalaccrual = formatfloat(totalaccrual, 2);
        totaltax = totalaccrual * (accrualtaxrate / 100.00);
        totaltax = formatfloat(totaltax, 2);
        gainedaccrual = totalaccrual - totaltax;
        gainedaccrual = formatfloat(gainedaccrual, 2);
        summation = gainedaccrual + savingmoney;
        summation = formatfloat(summation, 2);
        mensalaccrual = 0;
        mensalaccrual = formatfloat(totalaccrual / monthscale, 2);
    }
    else {

        var moneyname = document.getelementbyid("moneyname").value;
        var totalaccrual = "";
        if (moneyname == "gbp" || moneyname == "hkd") {
            totalaccrual = savingmoney * (interestrate / 100.00) * intervaldays / 360.00;//利息总额
        }
        else {
            totalaccrual = savingmoney * (interestrate / 100.00) * intervaldays / 365.00;//利息总额
        }

        totalaccrual = formatfloat(totalaccrual, 2);
        totaltax = totalaccrual * (accrualtaxrate / 100.00);
        totaltax = formatfloat(totaltax, 2);
        gainedaccrual = totalaccrual - totaltax;
        gainedaccrual = formatfloat(gainedaccrual, 2);
        summation = gainedaccrual + savingmoney;
        summation = formatfloat(summation, 2);
    }
    showdata_saving(totalaccrual + "|" + totaltax + "|" + gainedaccrual + "|" + summation + "|" + mensalaccrual);
}

/**
 * 返回结果处理
 * @param response ：结果对象
 */
function showdata_saving(rt) {
    var arrrt = rt.split("|");
    document.getelementbyid("totalaccrual").value = arrrt[0];
    document.getelementbyid("totaltax").value = arrrt[1];
    document.getelementbyid("gainedaccrual").value = arrrt[2];
    document.getelementbyid("saving_summation").value = arrrt[3];
    //    document.getelementbyid("mensalaccrual").value=arrrt[4];
}

/**
 * 获取存款总金额
 * @return 存款总金额，失败返回0
 */
function getsavingmoney() {
    if (checknumber(document.getelementbyid("savingmoney").value)) {
        return document.getelementbyid("savingmoney").value;
    } else {
        return 0;
    }
}

/**
 * 获取年利率
 * @return 年利率，失败返回0
 */
function getinterestrate() {
    if (checknumber(document.getelementbyid("interestrate").value)) {
        return document.getelementbyid("interestrate").value;
    } else {
        return 0;
    }
}

/**
 * 获取利息税率
 * @return 利息税率，失败返回-1
 */
function getaccrualtaxrate() {
    if (checknumber(document.getelementbyid("accrualtaxrate").value)) {
        return document.getelementbyid("accrualtaxrate").value;
    } else {
        return -1;
    }
}

/**
 * 清空数据
 */
function resetall() {
    document.getelementbyid("moneyname").value = "0";
    document.getelementbyid("savingkind").value = "0";
    document.getelementbyid("savingterm").value = "0";
    document.getelementbyid("interestrate").value = "0.00";
    document.getelementbyid("savingmoney").value = "0.00";
    document.getelementbyid("savingdays").value = "0";
    document.getelementbyid("totaltax").value = "0.00";
    document.getelementbyid("totalaccrual").value = "0.00";
    document.getelementbyid("accrualtaxrate").value = "0.00";
    document.getelementbyid("gainedaccrual").value = "0.00";
    document.getelementbyid("saving_summation").value = "0.00";
    document.getelementbyid("saving_startdate").value = gettodaydate();
    document.getelementbyid("saving_enddate").value = gettodaydate();
}

/**
 * 当选择“货币种类”下拉菜单时执行
 */
function changemoneyname() {
    var moneynameid = document.getelementbyid("moneyname").value;
    document.getelementbyid("savingkind").innerhtml = "";
    document.getelementbyid("savingkind").options.add(new option("--请选择--", "0"));
    for (var i = 0; i < savingkindarr.length; i++) {
        if (moneynameid == savingkindarr[i][0]) {
            document.getelementbyid("savingkind").options.add(new option(savingkindarr[i][1], savingkindarr[i][2]));
        }
    }
}

/**
 * 当选择“存款种类”下拉菜单时执行
 */
function changesavingkind() {
    var savingkindid = document.getelementbyid("savingkind").value;
    document.getelementbyid("savingterm").innerhtml = "";
    document.getelementbyid("savingterm").options.add(new option("--请选择--", "0"));
    for (var i = 0; i < savingtermarr.length; i++) {
        if (savingtermarr[i][1].indexof(savingkindid) == 0) {
            document.getelementbyid("savingterm").options.add(new option(savingtermarr[i][2], savingtermarr[i][0]));
        }
    }
}

/**
 * 当选择“存款期限”下拉菜单时执行
 */
function dochangesavingterm() {

    var termid = document.getelementbyid("savingterm").value;
    for (var i = 0; i < savingratearr.length; i++) {
        if (savingratearr[i][0] == termid) {
            document.getelementbyid("interestrate").value = savingratearr[i][1];
            break;
        }
    }

    savingterm = document.getelementbyid("savingterm").options[document.getelementbyid("savingterm").selectedindex].innertext;
    switch (savingterm) {
        case "一天":
            adddays(document.getelementbyid("saving_startdate").value, 7);
            break;
        case "七天":
            adddays(document.getelementbyid("saving_startdate").value, 7);
            break;
        case "一个月":
            addmonths(document.getelementbyid("saving_startdate").value, 1);
            break;
        case "三个月":
            dayscale = 0.25;
            addmonths(document.getelementbyid("saving_startdate").value, 3);
            break;
        case "六个月":
            addmonths(document.getelementbyid("saving_startdate").value, 6);
            break;
        case "半年":
            dayscale = 0.5;
            addmonths(document.getelementbyid("saving_startdate").value, 6);
            break;
        case "一年":
            dayscale = 1.0;
            monthscale = 12.0;
            addyears(document.getelementbyid("saving_startdate").value, 1);
            break;
        case "二年":
            dayscale = 2.0;
            addyears(document.getelementbyid("saving_startdate").value, 2);
            break;
        case "三年":
            dayscale = 3.0;
            monthscale = 36.0;
            addyears(document.getelementbyid("saving_startdate").value, 3);
            break;
        case "五年":
            dayscale = 5.0;
            monthscale = 60.0;
            addyears(document.getelementbyid("saving_startdate").value, 5);
            break;
        default:
            break;
    }
}
/**
 * 清空数据
 */
function resetall_saving() {
    document.getelementbyid("moneyname").value = "0";
    document.getelementbyid("savingkind").value = "0";
    document.getelementbyid("savingterm").value = "0";
    document.getelementbyid("interestrate").value = "0.00";
    document.getelementbyid("savingmoney").value = "0.00";
    document.getelementbyid("savingdays").value = "0";
    document.getelementbyid("totaltax").value = "0.00";
    document.getelementbyid("totalaccrual").value = "0.00";
    document.getelementbyid("accrualtaxrate").value = "0.00";
    document.getelementbyid("gainedaccrual").value = "0.00";
    document.getelementbyid("saving_summation").value = "0.00";
    document.getelementbyid("saving_startdate").value = gettodaydate();
    document.getelementbyid("saving_enddate").value = gettodaydate();
}