日历中的“今天”日期链接

Question

我正在使用 js 日历作为文本框，一切正常，但我试图在调用符上添加一个 TODAY 链接，因此当用户单击它时，今天的日期以 dd-mm-yyyy 格式出现在文本框中。

    function positionInfo(object) {
  var p_elm = object;
  this.getElementLeft = getElementLeft;
  function getElementLeft() {
    var x = 0;
    var elm;
    if(typeof(p_elm) == "object"){
      elm = p_elm;
    } else {
      elm = document.getElementById(p_elm);
    }
    while (elm != null) {
      x+= elm.offsetLeft;
      elm = elm.offsetParent;
    }
    return parseInt(x);
  }
  this.getElementWidth = getElementWidth;
  function getElementWidth(){
    var elm;
    if(typeof(p_elm) == "object"){
      elm = p_elm;
    } else {
      elm = document.getElementById(p_elm);
    }
    return parseInt(elm.offsetWidth);
  }
  this.getElementRight = getElementRight;
  function getElementRight(){
    return getElementLeft(p_elm) + getElementWidth(p_elm);
  }
  this.getElementTop = getElementTop;
  function getElementTop() {
    var y = 0;
    var elm;
    if(typeof(p_elm) == "object"){
      elm = p_elm;
    } else {
      elm = document.getElementById(p_elm);
    }
    while (elm != null) {
      y+= elm.offsetTop;
      elm = elm.offsetParent;
    }
    return parseInt(y);
  }
  this.getElementHeight = getElementHeight;
  function getElementHeight(){
    var elm;
    if(typeof(p_elm) == "object"){
      elm = p_elm;
    } else {
      elm = document.getElementById(p_elm);
    }
    return parseInt(elm.offsetHeight);
  }
  this.getElementBottom = getElementBottom;
  function getElementBottom(){
    return getElementTop(p_elm) + getElementHeight(p_elm);
  }
}
function CalendarControl() {
  var today = new Date();  
  var calendarId = 'CalendarControl';
  var currentYear = 0;
  var currentMonth = 0;
  var currentDay = 0;
  var selectedYear = 0;
  var selectedMonth = 0;
  var selectedDay = 0;
  var months = ['January','February','March','April','May','June','July','August','September','October','November','December'];
  var dateField = null;
  function getProperty(p_property){
    var p_elm = calendarId;
    var elm = null;
    if(typeof(p_elm) == "object"){
      elm = p_elm;
    } else {
      elm = document.getElementById(p_elm);
    }
    if (elm != null){
      if(elm.style){
        elm = elm.style;
        if(elm[p_property]){
          return elm[p_property];
        } else {
          return null;
        }
      } else {
        return null;
      }
    }
  }
  function setElementProperty(p_property, p_value, p_elmId){
    var p_elm = p_elmId;
    var elm = null;
    if(typeof(p_elm) == "object"){
      elm = p_elm;
    } else {
      elm = document.getElementById(p_elm);
    }
    if((elm != null) && (elm.style != null)){
      elm = elm.style;
      elm[ p_property ] = p_value;
    }
  }
  function setProperty(p_property, p_value) {
    setElementProperty(p_property, p_value, calendarId);
  }
  function getDaysInMonth(year, month) {
    return [31,((!(year % 4 ) && ( (year % 100 ) || !( year % 400 ) ))?29:28),31,30,31,30,31,31,30,31,30,31][month-1];
  }
  function getDayOfWeek(year, month, day) {
    var date = new Date(year,month-1,day)
    return date.getDay();
  }
  this.setDate = setDate;
  function setDate(year, month, day) {
    if (dateField) {
      if (month < 10) {month = "0" + month;}
      if (day < 10) {day = "0" + day;}
      var dateString = day+"-"+month+"-"+year;
      dateField.value = dateString;
      hide();
    }
    return;
  }
  this.changeMonth = changeMonth;
  function changeMonth(change) {
    currentMonth += change;
    currentDay = 0;
    if(currentMonth > 12) {
      currentMonth = 1;
      currentYear++;
    } else if(currentMonth < 1) {
      currentMonth = 12;
      currentYear--;
    }
    calendar = document.getElementById(calendarId);
    calendar.innerHTML = calendarDrawTable();
  }
  this.changeYear = changeYear;
  function changeYear(change) {
    currentYear += change;
    currentDay = 0;
    calendar = document.getElementById(calendarId);
    calendar.innerHTML = calendarDrawTable();
  }
  function getCurrentYear() {
    var year = new Date().getYear();
    if(year < 1900) year += 1900;
    return year;
  }
  function getCurrentMonth() {
    return new Date().getMonth() + 1;
  } 
  function getCurrentDay() {
    return new Date().getDate();
  }
  function calendarDrawTable() {
    var dayOfMonth = 1;
    var validDay = 0;
    var startDayOfWeek = getDayOfWeek(currentYear, currentMonth, dayOfMonth);
    var daysInMonth = getDaysInMonth(currentYear, currentMonth);
    var css_class = null; //CSS class for each day
    var table = "<table cellspacing='0' cellpadding='0' border='0'>";
    table = table + "<tr class='header'>";
    table = table + "  <td colspan='2' class='previous'><a href='javascript:changeCalendarControlMonth(-1);'>&lt;</a> <a href='javascript:changeCalendarControlYear(-1);'>&laquo;</a></td>";
    table = table + "  <td colspan='3' class='title'>" + months[currentMonth-1] + "<br>" + currentYear + "</td>";
    table = table + "  <td colspan='2' class='next'><a href='javascript:changeCalendarControlYear(1);'>&raquo;</a> <a href='javascript:changeCalendarControlMonth(1);'>&gt;</a></td>";
    table = table + "</tr>";
    table = table + "<tr><th>S</th><th>M</th><th>T</th><th>W</th><th>T</th><th>F</th><th>S</th></tr>";
    for(var week=0; week < 6; week++) {
      table = table + "<tr>";
      for(var dayOfWeek=0; dayOfWeek < 7; dayOfWeek++) {
        if(week == 0 && startDayOfWeek == dayOfWeek) {
          validDay = 1;
        } else if (validDay == 1 && dayOfMonth > daysInMonth) {
          validDay = 0;
        }
        if(validDay) {
          if (dayOfMonth == selectedDay && currentYear == selectedYear && currentMonth == selectedMonth) {
            css_class = 'current';
          } else if (dayOfWeek == 5 || dayOfWeek == 6) {
            css_class = 'weekend';
          } else {
            css_class = 'weekday';
          }
          table = table + "<td><a class='"+css_class+"' href="javascript:setCalendarControlDate("+currentYear+","+currentMonth+","+dayOfMonth+")">"+dayOfMonth+"</a></td>";
          dayOfMonth++;
        } else {
          table = table + "<td class='empty'>&nbsp;</td>";
        }
      }
      table = table + "</tr>";
    }
    // --------------------------- Here I need to add the today date link ----------------------//
  table = table + "<tr class='header'><th colspan='3' style='padding: 3px; '><a href='javascript:hideCalendarControl();' >Today</a></td><th>&nbsp;</td><th colspan='3' style='padding: 3px;'><a href='javascript:hideCalendarControl();'>Close</a></td></tr>";
    table = table + "</table>";
    return table;
  }
  this.show = show;
  function show(field) {
    // If the calendar is visible and associated with
    // this field do not do anything.
    if (dateField == field) {
      return;
    } else {
      dateField = field;
    }
    if(dateField) {
      try {
        var dateString = new String(dateField.value);
        var dateParts = dateString;
        selectedMonth = parseInt(dateParts[0],10);
        selectedDay = parseInt(dateParts[1],10);
        selectedYear = parseInt(dateParts[2],10);
      } catch(e) {}
    }
    if (!(selectedYear && selectedMonth && selectedDay)) {
      selectedMonth = getCurrentMonth();
      selectedDay = getCurrentDay();
      selectedYear = getCurrentYear();
    }
    currentMonth = selectedMonth;
    currentDay = selectedDay;
    currentYear = selectedYear;
    if(document.getElementById){
      calendar = document.getElementById(calendarId);
      calendar.innerHTML = calendarDrawTable(currentYear, currentMonth);
      setElementProperty('display', 'block', 'CalendarControlIFrame');
      setProperty('display', 'block');
      var fieldPos = new positionInfo(dateField);
      var calendarPos = new positionInfo(calendarId);
      var x = fieldPos.getElementLeft();
      var y = fieldPos.getElementBottom();
      x=x+155;
      y=y-22;
      setProperty('left', x + "px");
      setProperty('top', y + "px");
      setElementProperty('left', x + "px", 'CalendarControlIFrame');
      setElementProperty('top', y + "px", 'CalendarControlIFrame');
      setElementProperty('width', calendarPos.getElementWidth() + "px", 'CalendarControlIFrame');
      setElementProperty('height', calendarPos.getElementHeight() + "px", 'CalendarControlIFrame');
    }
  }
  this.hide = hide;
  function hide() {
    if(dateField) {
      setProperty('display', 'none');
      setElementProperty('display', 'none', 'CalendarControlIFrame');
      dateField = null;
    }
  }
}
var calendarControl = new CalendarControl();
function showCalendarControl(textField) {
  calendarControl.show(textField);
}
function hideCalendarControl() {
  calendarControl.hide();
}
function setCalendarControlDate(year, month, day) {
  calendarControl.setDate(year, month, day);
}
function changeCalendarControlYear(change) {
  calendarControl.changeYear(change);
}
function changeCalendarControlMonth(change) {
  calendarControl.changeMonth(change);
}

document.write("<iframe id='CalendarControlIFrame' src='javascript:false;' frameBorder='0' scrolling='no'></iframe>");
document.write("<div id='CalendarControl'></div>");

但它不起作用我使用此链接中的日历：日历

它应该很简单，但它对我不起作用？！

Answer 1

在文本框旁边插入一个链接，

    <asp:TextBox id="txtAbc" runat="server" />
    <a href="javascript:void(0)" id="lnkTodayDate">Today</a>
    <script type="text/javascript">
    $('#lnkTodayDate').click(function(){
        <%=txtAbc.ClientID%>.text = (new Date()).toLocaleDateString("en-US");
    });    
    </script>