还是jquery计算那个的问题

所要表达的问题 已经在图片上了 下面代码

做成一个函数就行了

            $("#time").change(function () {
                var time =parseInt( this.value);

                var num, unit;
                if (time < 30) { num = time; unit = '天' }
                else if (time < 365) { num = time / 30; unit = '月' }
                else { num = time / 365; unit = '年'; }

                var d = new Date($("#EntTime32").val().replace(/-/g, "/"));
                d = getDate(d, num, unit);


                var s1 = d.getFullYear() + "-" + (d.getMonth() + 1) + "-" + d.getDate();
                $('#EntTime31').val(s1);


            });
            function getDate(d, num, unit) {
                switch (unit) {
                    case '天':
                        d.setDate(d.getDate() + num);
                        break;
                    case '月':
                        var m1 = d.getMonth() + 1 + num;
                        if (m1 > 12) m1 = m1 % 12;
                        d.setMonth(d.getMonth() + num);
                        if (d.getMonth() + 1 != m1) {//出现进位操作
                            do { d.setDate(d.getDate() - 1); } while (d.getMonth() + 1 != m1);
                        }
                        break;
                    case '年':
                        d.setYear(d.getFullYear() + num);
                        break;
                }
                return d;
            }

js

  //初始化存入日期
        var d = new Date();
        var s2 = d.getFullYear() + "-" + (d.getMonth() + 1) + "-" + d.getDate();
        $('#EntTime32').val(s2);
        //计算提取日期
        $("#time").change(function () {
            var time = $("#time option:selected").val();


            var d = new Date($("#EntTime32").val().replace(/-/g, "/"));

            var s1 = d.getFullYear() + "-" + (d.getMonth() + 1) + "-" + d.getDate();    
            $('#EntTime31').val(s1);


        });

html

 <table cellpadding="0" cellspacing="1" >
                                                                                                                            <thead>
                                                                                                                                             <tr class="gx" >

                                                                                                                                                <td><span id="sp1">*</span>存入金额 </td>

                                                                                                                                                <td>
                                                                                                                                                     <input type="text" class="cc4" id="input1"  />
                                                                                                                                            （必输项）
                                                                                                                                                </td>

                                                                                                                                            </tr>

                                                                                                                            </thead>    

                                                                                                                             <tbody>    


                                                                                                                                            <tr>
                                                                                                                                                <td>上浮区间       </td>
                                                                                                                                                <td >

                                                                                                                                                    <select id="shangfu" style="width:20%;height:35px;margin-left:20px; padding-left:5px;">
                                                                                                                                                        <option>0</option>
                                                                                                                                                        <option>10</option>
                                                                                                                                                        <option>20</option>
                                                                                                                                                        <option>30</option>
                                                                                                                                                    </select><span>%</span>
                                                                                                                                                </td>
                                                                                                                                            </tr>

                                                                                                                                            <tr>
                                                                                                                                                <td>存入日期  </td>
                                                                                                                                                <td>
                                                                                                                                                      <input type="text" class="date" id="EntTime32" name="EntTime32" onclick="return showCalendar('EntTime32', 'y-mm-dd');" value=""  /><span>请点击</span>

                                                                                                                                                </td>
                                                                                                                                            </tr>

                                                                                                                                          <tr>
                                                                                                                                                <td>提取日期  </td>
                                                                                                                                                <td>
                                                                                                                                                      <input type="text" class="date" id="EntTime31" name="EntTime31"  onBlur="changeResult1()" onclick="return showCalendar('EntTime31', 'y-mm-dd');return check()"  /><span>请点击</span>
                                                                                                                                                      <select id="time" style="width:20%;height:35px;margin-left:20px;">
                                                                                                                                                            <option value="0">请选择</option>
                                                                                                                                                            <option value="1">1天</option>
                                                                                                                                                            <option  value="7">7天</option>
                                                                                                                                                            <option value="90">3个月</option>
                                                                                                                                                            <option value="180"> 6个月</option>
                                                                                                                                                            <option value="365">1年</option>
                                                                                                                                                            <option value="730">2年</option>
                                                                                                                                                            <option value="1095">3年</option>
                                                                                                                                                            <option value="1825">5年</option>

                                                                                                                                                      </select>
                                                                                                                                                </td>
                                                                                                                                            </tr>
                                                                                                                                        <tr>
                                                                                                                                            <td>
                                                                                                                                                利息
                                                                                                                                            </td>
                                                                                                                                            <td>
                                                                                                                                                <input id = "li" type="text" class="cc3"/>元
                                                                                                                                            </td>
                                                                                                                                        </tr>    
                                                                                                                                         <tr>
                                                                                                                                            <td>
                                                                                                                                                本息合计
                                                                                                                                            </td>
                                                                                                                                            <td>
                                                                                                                                                <input id="bxhj"  type="text" class="cc3"/>元
                                                                                                                                            </td>
                                                                                                                                        </tr>      


                                                                                                                                        </tbody>

                                                                                                                    </table>

                                                                                                                      <input type="button" id="submit2" value="开始计算"/>
                                                                                                                     <input type="reset" class="bt" value="重置"/>


                                                                                                               </div>

                                                                                                                <div class="output">

                                                                                                                            <h4>计算结果</h4>
                                                                                                                            <hr class="hi"/>
                                                                                                                             <div >
                                                                                                                                <table id="table"  border="1" cellspacing="0" cellpadding="10" width="1000px">
                                                                                                                                    <thead>
                                                                                                                                          <tr>
                                                                                                                                            <td >
                                                                                                                                                <select id="bizhong" style="width:70%;height:35px;text-align:cente; margin-top:10px;margin-left:20px; background-color:rgb(236,224,31);border:none;">
                                                                                                                                                    <option value="1">人民币</option>
                                                                                                                                                    <option value="2">美元</option>
                                                                                                                                                    <option value="3">英镑</option>
                                                                                                                                                    <option value="4">欧元</option>
                                                                                                                                                    <option value="5">日元</option>
                                                                                                                                                    <option value="6">港币</option>
                                                                                                                                                    <option value="7">加拿大元</option>
                                                                                                                                                    <option value="8">瑞士法郎</option>
                                                                                                                                                    <option value="9">新加坡元</option>
                                                                                                                                                    <option value="10">澳大利亚元</option>

                                                                                                                                                </select>   
                                                                                                                                            </td>

var sTime = document.getElementById('time').selectedIndex-1;
             if(sTime)$('#EntTime31').val($('#daoqiri7'+(sTime==0?'':sTime).text());