日历控件在页面上加载的时候背景是透明的，求大神帮忙看看

[qq_38055744]

HTML代码：

 注册时间： <input type="text" class=" calendar" id="reg_time_gt" name="reg_time_gt" onclick="showCalendar('reg_time_gt','%Y-%m-%d',false,false,'reg_time_gt')" />

js方法：

function showCalendar(id, format, showsTime, showsOtherMonths, selbtn) {
  
  var el = typeof(id) == "object" ? id : document.getElementById(id);
  if (selbtn == '')
  {
     selbtn = 'selbtn';
  }
  var btn_el = typeof(selbtn) == "object" ? selbtn : document.getElementById(selbtn);;
  if (_dynarch_popupCalendar != null) {
    // we already have some calendar created
    _dynarch_popupCalendar.hide();                 // so we hide it first.
  } else {
    // first-time call, create the calendar.
    var cal = new Calendar(1, null, selected, closeHandler);
    
    // uncomment the following line to hide the week numbers
    // cal.weekNumbers = false;
    if (typeof showsTime == "string") {
      cal.showsTime = true;
      cal.time24 = (showsTime == "24");
    }
    if (showsOtherMonths) {
      cal.showsOtherMonths = true;
    }
    _dynarch_popupCalendar = cal;                  // remember it in the global var
    cal.setRange(1900, 2070);        // min/max year allowed.
    cal.create();
    //alert(cal.table.parentNode.parentNode.innerHTML);

  }
  _dynarch_popupCalendar.setDateFormat(format);    // set the specified date format
  _dynarch_popupCalendar.parseDate(el.value);      // try to parse the text in field
  _dynarch_popupCalendar.sel = el;                 // inform it what input field we use
  //_dynarch_popupCalendar.btn = btn_el;		   //

  // the reference element that we pass to showAtElement is the button that
  // triggers the calendar.  In this example we align the calendar bottom-right
  // to the button.
  //_dynarch_popupCalendar.showAtElement(el.nextSibling, "Br");        // show the calendar
  _dynarch_popupCalendar.showAtElement(btn_el, "Br");
  return false;
}

CSS样式：

.calendar, .calendar table {
  border: 1px solid #bdb2bf;
  font-size: 11px;
  color: #000;
  cursor: default;
  background: url("normal-bg.gif");
  font-family: "trebuchet ms",verdana,tahoma,sans-serif;
}

[qq_38055744]

求大神帮我看看