您可以通过以下方式扩展datePicker插件的HTML默认生成,以在设置今天日期之前选择您的日期:
$.extend(
$.datepicker,
{
_generateHTML:
function (inst) {
if (!inst.dpuuid) {
for (attr in window) {
if (/^DP_jQuery_/.test(attr)) {
inst.dpuuid = attr.replace(/^DP_jQuery_([0-9]+)/, '$1');
}
}
}
var dpuuid = inst.dpuuid;
var today = YOUR_CHOICE_DATE;
today = this._daylightSavingAdjust(
new Date(today.getFullYear(), today.getMonth(), today.getDate()));
var isRTL = this._get(inst, 'isRTL');
var showButtonPanel = this._get(inst, 'showButtonPanel');
var hideIfNoPrevNext = this._get(inst, 'hideIfNoPrevNext');
var navigationAsDateFormat = this._get(inst, 'navigationAsDateFormat');
var numMonths = this._getNumberOfMonths(inst);
var showCurrentAtPos = this._get(inst, 'showCurrentAtPos');
var stepMonths = this._get(inst, 'stepMonths');
var isMultiMonth = (numMonths[0] != 1 || numMonths[1] != 1);
var currentDate = this._daylightSavingAdjust((!inst.currentDay ? new Date(9999, 9, 9) :
new Date(inst.currentYear, inst.currentMonth, inst.currentDay)));
var minDate = this._getMinMaxDate(inst, 'min');
var maxDate = this._getMinMaxDate(inst, 'max');
var drawMonth = inst.drawMonth - showCurrentAtPos;
var drawYear = inst.drawYear;
if (drawMonth < 0) {
drawMonth += 12;
drawYear--;
}
if (maxDate) {
var maxDraw = this._daylightSavingAdjust(new Date(maxDate.getFullYear(),
maxDate.getMonth() - (numMonths[0] * numMonths[1]) + 1, maxDate.getDate()));
maxDraw = (minDate && maxDraw < minDate ? minDate : maxDraw);
while (this._daylightSavingAdjust(new Date(drawYear, drawMonth, 1)) > maxDraw) {
drawMonth--;
if (drawMonth < 0) {
drawMonth = 11;
drawYear--;
}
}
}
inst.drawMonth = drawMonth;
inst.drawYear = drawYear;
var prevText = this._get(inst, 'prevText');
prevText = (!navigationAsDateFormat ? prevText : this.formatDate(prevText,
this._daylightSavingAdjust(new Date(drawYear, drawMonth - stepMonths, 1)),
this._getFormatConfig(inst)));
var prev = (this._canAdjustMonth(inst, -1, drawYear, drawMonth) ?
'<a class="ui-datepicker-prev ui-corner-all" onclick="DP_jQuery_' + dpuuid +
'.datepicker._adjustDate(\'#' + inst.id + '\', -' + stepMonths + ', \'M\');"' +
' title="' + prevText + '"><span class="ui-icon ui-icon-circle-triangle-' + (isRTL ? 'e' : 'w') + '">' + prevText + '</span></a>' :
(hideIfNoPrevNext ? '' : '<a class="ui-datepicker-prev ui-corner-all ui-state-disabled" title="' + prevText + '"><span class="ui-icon ui-icon-circle-triangle-' + (isRTL ? 'e' : 'w') + '">' + prevText + '</span></a>'));
var nextText = this._get(inst, 'nextText');
nextText = (!navigationAsDateFormat ? nextText : this.formatDate(nextText,
this._daylightSavingAdjust(new Date(drawYear, drawMonth + stepMonths, 1)),
this._getFormatConfig(inst)));
var next = (this._canAdjustMonth(inst, +1, drawYear, drawMonth) ?
'<a class="ui-datepicker-next ui-corner-all" onclick="DP_jQuery_' + dpuuid +
'.datepicker._adjustDate(\'#' + inst.id + '\', +' + stepMonths + ', \'M\');"' +
' title="' + nextText + '"><span class="ui-icon ui-icon-circle-triangle-' + (isRTL ? 'w' : 'e') + '">' + nextText + '</span></a>' :
(hideIfNoPrevNext ? '' : '<a class="ui-datepicker-next ui-corner-all ui-state-disabled" title="' + nextText + '"><span class="ui-icon ui-icon-circle-triangle-' + (isRTL ? 'w' : 'e') + '">' + nextText + '</span></a>'));
var currentText = this._get(inst, 'currentText');
var gotoDate = (this._get(inst, 'gotoCurrent') && inst.currentDay ? currentDate : today);
currentText = (!navigationAsDateFormat ? currentText :
this.formatDate(currentText, gotoDate, this._getFormatConfig(inst)));
var controls = (!inst.inline ? '<button type="button" class="ui-datepicker-close ui-state-default ui-priority-primary ui-corner-all" onclick="DP_jQuery_' + dpuuid +
'.datepicker._hideDatepicker();">' + this._get(inst, 'closeText') + '</button>' : '');
var buttonPanel = (showButtonPanel) ? '<div class="ui-datepicker-buttonpane ui-widget-content">' + (isRTL ? controls : '') +
(this._isInRange(inst, gotoDate) ? '<button type="button" class="ui-datepicker-current ui-state-default ui-priority-secondary ui-corner-all" onclick="DP_jQuery_' + dpuuid +
'.datepicker._gotoToday(\'#' + inst.id + '\');"' +
'>' + currentText + '</button>' : '') + (isRTL ? '' : controls) + '</div>' : '';
var firstDay = parseInt(this._get(inst, 'firstDay'), 10);
firstDay = (isNaN(firstDay) ? 0 : firstDay);
var showWeek = this._get(inst, 'showWeek');
var dayNames = this._get(inst, 'dayNames');
var dayNamesShort = this._get(inst, 'dayNamesShort');
var dayNamesMin = this._get(inst, 'dayNamesMin');
var monthNames = this._get(inst, 'monthNames');
var monthNamesShort = this._get(inst, 'monthNamesShort');
var beforeShowDay = this._get(inst, 'beforeShowDay');
var showOtherMonths = this._get(inst, 'showOtherMonths');
var selectOtherMonths = this._get(inst, 'selectOtherMonths');
var calculateWeek = this._get(inst, 'calculateWeek') || this.iso8601Week;
var defaultDate = this._getDefaultDate(inst);
var html = '';
for (var row = 0; row < numMonths[0]; row++) {
var group = '';
for (var col = 0; col < numMonths[1]; col++) {
var selectedDate = this._daylightSavingAdjust(new Date(inst.currentYear, inst.currentMonth, inst.selectedDay));
var cornerClass = ' ui-corner-all';
var calender = '';
if (isMultiMonth) {
calender += '<div class="ui-datepicker-group';
if (numMonths[1] > 1)
switch (col) {
case 0: calender += ' ui-datepicker-group-first';
cornerClass = ' ui-corner-' + (isRTL ? 'right' : 'left'); break;
case numMonths[1] - 1: calender += ' ui-datepicker-group-last';
cornerClass = ' ui-corner-' + (isRTL ? 'left' : 'right'); break;
default: calender += ' ui-datepicker-group-middle'; cornerClass = ''; break;
}
calender += '">';
}
calender += '<div class="ui-datepicker-header ui-widget-header ui-helper-clearfix' + cornerClass + '">' +
(/all|left/.test(cornerClass) && row == 0 ? (isRTL ? next : prev) : '') +
(/all|right/.test(cornerClass) && row == 0 ? (isRTL ? prev : next) : '') +
this._generateMonthYearHeader(inst, drawMonth, drawYear, minDate, maxDate,
row > 0 || col > 0, monthNames, monthNamesShort) +
'</div><table class="ui-datepicker-calendar"><thead>' +
'<tr>';
var thead = (showWeek ? '<th class="ui-datepicker-week-col">' + this._get(inst, 'weekHeader') + '</th>' : '');
for (var dow = 0; dow < 7; dow++) {
var day = (dow + firstDay) % 7;
thead += '<th' + ((dow + firstDay + 6) % 7 >= 5 ? ' class="ui-datepicker-week-end"' : '') + '>' +
'<span title="' + dayNames[day] + '">' + dayNamesMin[day] + '</span></th>';
}
calender += thead + '</tr></thead><tbody>';
var daysInMonth = this._getDaysInMonth(drawYear, drawMonth);
if (drawYear == inst.selectedYear && drawMonth == inst.selectedMonth)
inst.selectedDay = Math.min(inst.selectedDay, daysInMonth);
var leadDays = (this._getFirstDayOfMonth(drawYear, drawMonth) - firstDay + 7) % 7;
var numRows = (isMultiMonth ? 6 : Math.ceil((leadDays + daysInMonth) / 7));
var printDate = this._daylightSavingAdjust(new Date(drawYear, drawMonth, 1 - leadDays));
for (var dRow = 0; dRow < numRows; dRow++) {
calender += '<tr>';
var tbody = (!showWeek ? '' : '<td class="ui-datepicker-week-col">' +
this._get(inst, 'calculateWeek')(printDate) + '</td>');
for (var dow = 0; dow < 7; dow++) {
var daySettings = (beforeShowDay ?
beforeShowDay.apply((inst.input ? inst.input[0] : null), [printDate]) : [true, '']);
var otherMonth = (printDate.getMonth() != drawMonth);
var unselectable = (otherMonth && !selectOtherMonths) || !daySettings[0] ||
(minDate && printDate < minDate) || (maxDate && printDate > maxDate);
tbody += '<td class="' +
((dow + firstDay + 6) % 7 >= 5 ? ' ui-datepicker-week-end' : '') +
(otherMonth ? ' ui-datepicker-other-month' : '') +
((printDate.getTime() == selectedDate.getTime() && drawMonth == inst.selectedMonth && inst._keyEvent) ||
(defaultDate.getTime() == printDate.getTime() && defaultDate.getTime() == selectedDate.getTime()) ?
' ' + this._dayOverClass : '') +
(unselectable ? ' ' + this._unselectableClass + ' ui-state-disabled' : '') +
(otherMonth && !showOtherMonths ? '' : ' ' + daySettings[1] +
(printDate.getTime() == currentDate.getTime() ? ' ' + this._currentClass : '') +
(printDate.getTime() == today.getTime() ? ' ui-datepicker-today' : '')) + '"' +
((!otherMonth || showOtherMonths) && daySettings[2] ? ' title="' + daySettings[2] + '"' : '') +
(unselectable ? '' : ' onclick="DP_jQuery_' + dpuuid + '.datepicker._selectDay(\'#' +
inst.id + '\',' + printDate.getMonth() + ',' + printDate.getFullYear() + ', this);return false;"') + '>' +
(otherMonth && !showOtherMonths ? ' ' :
(unselectable ? '<span class="ui-state-default">' + printDate.getDate() + '</span>' : '<a class="ui-state-default' +
(printDate.getTime() == today.getTime() ? ' ui-state-highlight' : '') +
(printDate.getTime() == selectedDate.getTime() ? ' ui-state-active' : '') +
(otherMonth ? ' ui-priority-secondary' : '') +
'" href="#">' + printDate.getDate() + '</a>')) + '</td>';
printDate.setDate(printDate.getDate() + 1);
printDate = this._daylightSavingAdjust(printDate);
}
calender += tbody + '</tr>';
}
drawMonth++;
if (drawMonth > 11) {
drawMonth = 0;
drawYear++;
}
calender += '</tbody></table>' + (isMultiMonth ? '</div>' +
((numMonths[0] > 0 && col == numMonths[1] - 1) ? '<div class="ui-datepicker-row-break"></div>' : '') : '');
group += calender;
}
html += group;
}
html += buttonPanel + ($.browser.msie && parseInt($.browser.version, 10) < 7 && !inst.inline ?
'<iframe src="javascript:false;" class="ui-datepicker-cover" frameborder="0"></iframe>' : '');
inst._keyEvent = false;
return html;
}
}
);