//  去掉利率的版本，利率改為手動填寫
function exc_js(fmobj,v){
		if (v==1){
            document.getElementById("pricep").style.display='block';
            document.getElementById("sqmp").style.display='block';
            document.getElementById("anjiep").style.display='block';
            document.getElementById("calc_js_div2").style.display='none';
			fmobj.type.value=1;
		}else{
            document.getElementById("pricep").style.display='none';
            document.getElementById("sqmp").style.display='none';
            document.getElementById("anjiep").style.display='none';
            document.getElementById("calc_js_div2").style.display='block';
		}
}
function formReset(fmobj){
	if (fmobj.name=="calc1"){
		document.all.calc1_js_div1.style.display='block';
		document.all.calc1_js_div2.style.display='none';
		document.all.calc1_zuhe.style.display='none';
		document.all.calc1_benjin.style.display='none';
	}else{
		document.all.calc2_js_div1.style.display='block';
		document.all.calc2_js_div2.style.display='none';
		document.all.calc2_zuhe.style.display='none';
		document.all.calc2_benxi.style.display='none';
	}
}

//验证是否为数字
function reg_Num(str){
	if (str.length==0){return false;}
	var Letters = "1234567890.";

	for (i=0;i<str.length;i++){
		var CheckChar = str.charAt(i);
		if (Letters.indexOf(CheckChar) == -1){return false;}
	}
	return true;
}

//本金还款的月还款额(参数: 年利率 / 贷款总额 / 贷款总月份 / 贷款当前月0～length-1)
function getMonthMoney2(lilv,total,month,cur_month){
	var lilv_month = lilv / 12;//月利率
	//return total * lilv_month * Math.pow(1 + lilv_month, month) / ( Math.pow(1 + lilv_month, month) -1 );
	var benjin_money = total/month;
	return (total - benjin_money * cur_month) * lilv_month + benjin_money;

}


//本息还款的月还款额(参数: 年利率/贷款总额/贷款总月份)
function getMonthMoney1(lilv,total,month){
	var lilv_month = lilv / 12;//月利率
	return total * lilv_month * Math.pow(1 + lilv_month, month) / ( Math.pow(1 + lilv_month, month) -1 );
}

function ext_total(fmobjname){
	var fmobj=document.forms[fmobjname];
	var years = fmobj.years.value;
	var month = fmobj.years.value * 12;

	fmobj.month1.value = month+"(月)";
	fmobj.month2.value = month+"(月)";
	if (!reg_Num(fmobj.lilv.value)||parseFloat(fmobj.lilv.value)>100||parseFloat(fmobj.lilv.value)<=0){alert("請填寫利率，利率介于100與0之間");fmobj.lilv.focus();return false;}
	
	
	if (fmobj.type.value == 3 ){
		//--  组合型贷款(组合型贷款的计算，只和商业贷款额、和公积金贷款额有关，和按贷款总额计算无关)
			if (!reg_Num(fmobj.total_sy.value)){alert("混合型貸款請填寫商代比例");fmobj.total_sy.focus();return false;}
			if (!reg_Num(fmobj.total_gjj.value)){alert("混合型貸款請填寫公積金比例");fmobj.total_gjj.focus();return false;}
			if (fmobj.total_sy.value==null){fmobj.total_sy.value=0;}
			if (fmobj.total_gjj.value==null){fmobj.total_gjj.value=0;}
			var total_sy = fmobj.total_sy.value;
			var total_gjj = fmobj.total_gjj.value;
			fmobj.fangkuan_total1.value = "略";//房款总额
			fmobj.fangkuan_total2.value = "略";//房款总额
			fmobj.money_first1.value = 0;//首期付款
			fmobj.money_first2.value = 0;//首期付款

			//贷款总额
			var total_sy = parseInt(fmobj.total_sy.value);
			var total_gjj = parseInt(fmobj.total_gjj.value);
			var daikuan_total = total_sy + total_gjj;
			fmobj.daikuan_total1.value = daikuan_total;
			fmobj.daikuan_total2.value = daikuan_total;

			//月还款
			var lilv_sd =parseFloat(fmobj.lilv.value)/100; // getlilv(fmobj.lilv.value,1, years);//得到商贷利率
			var lilv_gjj =parseFloat(fmobj.lilv.value)/100;// getlilv(fmobj.lilv.value,2, years);//得到公积金利率

			//1.本金还款
				//月还款
				var all_total2 = 0;
				var month_money2 = "";
				for(j=0;j<month;j++) {
					//调用函数计算: 本金月还款额
					huankuan = getMonthMoney2(lilv_sd,total_sy,month,j) + getMonthMoney2(lilv_gjj,total_gjj,month,j);
					all_total2 += huankuan;
					huankuan = Math.round(huankuan*100)/100;
					//fmobj.month_money2.options[j] = new Option( (j+1) +"月," + huankuan + "(元)", huankuan);
					month_money2 += (j+1) +"月," + huankuan + "(元)\n";
				}
				fmobj.month_money2.value = month_money2;
				//还款总额
				fmobj.all_total2.value = Math.round(all_total2*100)/100;
				//支付利息款
				fmobj.accrual2.value = Math.round( (all_total2 - daikuan_total) *100)/100;


			//2.本息还款
				//月均还款
				var month_money1 = getMonthMoney1(lilv_sd,total_sy,month) + getMonthMoney1(lilv_gjj,total_gjj,month);//调用函数计算
				fmobj.month_money1.value = Math.round(month_money1*100)/100 + "(元)";
				//还款总额
				var all_total1 = month_money1 * month;
				fmobj.all_total1.value = Math.round(all_total1*100)/100;
				//支付利息款
				fmobj.accrual1.value = Math.round( (all_total1 - daikuan_total) *100)/100;

	}else{
		//--  商业贷款、公积金贷款
			var lilv = parseFloat(fmobj.lilv.value)/100;//getlilv(fmobj.lilv.value,fmobj.type.value, fmobj.years.value);//得到利率
			if (fmobj.jisuan_radio[0].checked == true){
				//------------ 根据单价面积计算
				if (!reg_Num(fmobj.price.value)){alert("請填寫單價");fmobj.price.focus();return false;}
				if (!reg_Num(fmobj.sqm.value)){alert("請填寫面積");fmobj.sqm.focus();return false;}

				//房款总额
				var fangkuan_total = fmobj.price.value * fmobj.sqm.value;
				fmobj.fangkuan_total1.value = fangkuan_total;
				fmobj.fangkuan_total2.value = fangkuan_total;
				//贷款总额
				var daikuan_total = (fmobj.price.value * fmobj.sqm.value) * (fmobj.anjie.value/10);
				fmobj.daikuan_total1.value = daikuan_total;
				fmobj.daikuan_total2.value = daikuan_total;
				//首期付款
				var money_first = fangkuan_total - daikuan_total;
				fmobj.money_first1.value = money_first
				fmobj.money_first2.value = money_first;
			}else{
				//------------ 根据贷款总额计算
				if (fmobj.daikuan_total000.value.length==0){alert("請填寫貸款總額");fmobj.daikuan_total000.focus();return false;}

				//房款总额
				fmobj.fangkuan_total1.value = "略";
				fmobj.fangkuan_total2.value = "略";
				//贷款总额
				var daikuan_total = fmobj.daikuan_total000.value;
				fmobj.daikuan_total1.value = daikuan_total;
				fmobj.daikuan_total2.value = daikuan_total;
				//首期付款
				fmobj.money_first1.value = 0;
				fmobj.money_first2.value = 0;
			}
			//1.本金还款
				//月还款
				var all_total2 = 0;
				var month_money2 = "";
				for(j=0;j<month;j++) {
					//调用函数计算: 本金月还款额
					huankuan = getMonthMoney2(lilv,daikuan_total,month,j);
					all_total2 += huankuan;
					huankuan = Math.round(huankuan*100)/100;
					//fmobj.month_money2.options[j] = new Option( (j+1) +"月," + huankuan + "(元)", huankuan);
					month_money2 += (j+1) +"月," + huankuan + "(元)\n";
				}
				fmobj.month_money2.value = month_money2;
				//还款总额
				fmobj.all_total2.value = Math.round(all_total2*100)/100;
				//支付利息款
				fmobj.accrual2.value = Math.round( (all_total2 - daikuan_total) *100)/100;


			//2.本息还款
				//月均还款
				var month_money1 = getMonthMoney1(lilv,daikuan_total,month);//调用函数计算
				fmobj.month_money1.value = Math.round(month_money1*100)/100 + "(元)";
				//还款总额
				var all_total1 = month_money1 * month;
				fmobj.all_total1.value = Math.round(all_total1*100)/100;
				//支付利息款
				fmobj.accrual1.value = Math.round( (all_total1 - daikuan_total) *100)/100;
	}
}