JScript运行时错误:“setDayHM”是未定义的 。明明已经定义了

  <script language="javascript" type="text/javascript" >
    // ---------------------- 用户可调用的函数 -----------------------------//
   //用户主调函数－只选择日期
   function setDay(obj){
    tiannetOutObject = obj;
    //如果标签中有值，则将日期初始化为当前值
    var strValue = tiannetTrim(tiannetOutObject.value);
    if( strValue != "" ){
     tiannetInitDate(strValue);
    }
    tiannetPopCalendar();
   }
   //用户主调函数－选择日期和小时
   function setDayH(obj){
    tiannetOutObject = obj;
    m_bolShowHour = true;
    //如果标签中有值，则将日期和小时初始化为当前值
    var strValue = tiannetTrim(tiannetOutObject.value);
    if( strValue != "" ){
     tiannetInitDate(strValue.substring(0,10));
     var hour = strValue.substring(11,13);
     if( hour < 10 ) tiannetHour = hour.substring(1,2);
    }
    tiannetPopCalendar();
   }
 
   //------------------ end 显示日期时间的span标签响应事件 ---------------------------//
   //判断某年是否为闰年
   function isPinYear(year){
    var bolRet = false;
    if (0==year%4&&((year%100!=0)||(year%400==0))) {
     bolRet = true;
    }
    return bolRet;
   }
   //得到一个月的天数，闰年为29天
   function getMonthCount(year,month){
    var c=m_aMonHead[month-1];
    if((month==2)&&isPinYear(year)) c++;
    return c;
   }
   //重新设置当前的日。主要是防止在翻年、翻月时，当前日大于当月的最大日
   function setRealDayCount() {
    if( tiannetDay > getMonthCount(tiannetYear,tiannetMonth) ) {
     //如果当前的日大于当月的最大日，则取当月最大日
     tiannetDay = getMonthCount(tiannetYear,tiannetMonth);
    }
   }
   //在个位数前加零
   function addZero(value){
    if(value < 10 ){
     value = "0" + value;
    }
    return value;
   }
   //取出空格
   function tiannetTrim(str) {
    return str.replace(/(^\s*)|(\s*$)/g,"");
   }
   //为select创建一个option
   function createOption(objSelect,value,text){
    var option = document.createElement("OPTION");
    option.value = value;
    option.text = text;
    objSelect.options.add(option);
   }
   //往前翻 Year
   function tiannetPrevYear() {
    if(tiannetYear > 999 && tiannetYear <10000){tiannetYear--;}
    else{alert("年份超出范围（1000-9999）！");}
    tiannetSetDay(tiannetYear,tiannetMonth);
    //如果年份小于允许的最小年份，则创建对应的option
    if( tiannetYear < tiannetYearSt ) {
     tiannetYearSt = tiannetYear;
     createOption(document.all.selTianYear,tiannetYear,tiannetYear + "年");
    }
    checkSelect(document.all.selTianYear,tiannetYear);
    tiannetWriteHead();
   }
   //往后翻 Year
   function tiannetNextYear() {
    if(tiannetYear > 999 && tiannetYear <10000){tiannetYear++;}
    else{alert("年份超出范围（1000-9999）！");return;}
    tiannetSetDay(tiannetYear,tiannetMonth);
    //如果年份超过允许的最大年份，则创建对应的option
    if( tiannetYear > tiannetYearEnd ) {
     tiannetYearEnd = tiannetYear;
     createOption(document.all.selTianYear,tiannetYear,tiannetYear + "年");
    }
    checkSelect(document.all.selTianYear,tiannetYear);
    tiannetWriteHead();
   }
   //选择今天
   function tiannetToday() {
    tiannetYear = tiannetDateNow.getFullYear();
    tiannetMonth = tiannetDateNow.getMonth()+1;
    tiannetDay = tiannetDateNow.getDate();
    tiannetSetValue(true);
    //tiannetSetDay(tiannetYear,tiannetMonth);
    //selectObject();
   }
   //往前翻月份
   function tiannetPrevMonth() {
    if(tiannetMonth>1){tiannetMonth--}else{tiannetYear--;tiannetMonth=12;}
    tiannetSetDay(tiannetYear,tiannetMonth);
    checkSelect(document.all.selTianMonth,tiannetMonth);
    tiannetWriteHead();
   }
     //根据option的值选中option
   function checkSelect(objSelect,selectValue) {
    var count = parseInt(objSelect.length);
    if( selectValue < 10 && selectValue.toString().length == 2) {
     selectValue = selectValue.substring(1,2);
    }
    for(var i = 0;i < count;i ++){
     if(objSelect.options[i].value == selectValue){
      objSelect.selectedIndex = i;
      break;
     }
    }//for
   }
   //选中年、月、时、分等下拉框
   function selectObject(){
    //如果年份小于允许的最小年份，则创建对应的option
    if( tiannetYear < tiannetYearSt ) {
     for( var i = tiannetYear;i < tiannetYearSt;i ++  ){
      createOption(document.all.selTianYear,i,i + "年");
     }
     tiannetYearSt = tiannetYear;
    }
    //如果年份超过允许的最大年份，则创建对应的option
    if( tiannetYear > tiannetYearEnd ) {
     for( var i = tiannetYearEnd+1;i <= tiannetYear;i ++  ){
      createOption(document.all.selTianYear,i,i + "年");
     }
     tiannetYearEnd = tiannetYear;
    }
    checkSelect(document.all.selTianYear,tiannetYear);
    checkSelect(document.all.selTianMonth,tiannetMonth);
    if( m_bolShowHour )  checkSelect(document.all.selTianHour,tiannetHour);
    if( m_bolShowMinute ) checkSelect(document.all.selTianMinute,tiannetMinute);
   }     </script>    
</asp:Content><asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
    <div id="i" runat="server" style="display:block; position:absolute; left:40%; margin-top:-50%; z-index :2 ;">
          <table  border="1" cellpadding="0" cellspacing="0" style="background-image:url(tb_bg.jpg);  ">
              <tr>
                 <td colspan="2" align="center">
                    <h2>会议室申请</h2> 
                 </td>
              </tr>
              <tr>
                 <td style="height: 26px" align="right">会议室名称：</td>
                 <td align="left" style="height: 26px" >
                     <asp:Label ID="Label1" runat="server" Text=""></asp:Label>
                 </td>
             </tr>
              <tr>
                 <td align="right">会议内容：</td>
                 <td align="left" >
                     <asp:TextBox ID="TextBox2" runat="server" TextMode="MultiLine"  Width="150"></asp:TextBox></td>
             </tr>
               <tr>
                 <td align="right">邀请人：</td>
                 <td align="left" > 
                        <div id="divlist" >
                          <asp:TextBox ID="txtjoin" runat="server" TextMode="MultiLine" Width="150"></asp:TextBox>   
                          <asp:TreeView ID="TreeView1" runat="server" Width="145px">
                            </asp:TreeView>
                      </div>                     
                 </td>
             </tr>
             <tr>
                 <td style="height: 26px" align="right">联系号码：</td>
                 <td align="left" style="width: 217px; height: 26px;">
                     <asp:TextBox ID="txtcall" runat="server" Width="150"></asp:TextBox>           
                 </td>
             </tr>
             <tr>
                 <td align="right" >From：</td>
                 <td align="left" >
             
                    <input type="text" name="datehm" readonly="readonly"  onclick  ="setDayHM(this);" runat="server" id="starttime" />                 </td>
             </tr> 
             <tr>
                 <td  align="right" >To：</td>
                 <td align="left">               
                      <input type="text" name="datehm" readonly="readonly" onclick="setDayHM(this);" runat="server" id="endtime" /> 
                 </td>
              
              </tr>
              <tr>
                 <td colspan="2" style="height: 26px" align="center" >
                     <asp:Button ID="Button1" runat="server" Text="提交" Width="100"/>&nbsp;&nbsp;&nbsp;
                           <asp:Button ID="Button2" runat="server" Text="取消" Width="100"/>
                 </td>
              </tr>
       </table>   
        </div>        
</asp:Content>当点击  <input type="text" name="datehm" readonly="readonly"  onclick  ="setDayHM(this);" runat="server" id="starttime" />
时 报错，未定义setDayHM(this)
求各位高手解答~！！！！！！！