DateInput=(function($){function DateInput(el,opts){if(typeof(opts)!="object")opts={};$.extend(this,DateInput.DEFAULT_OPTS,opts);this.input=$(el);this.bindMethodsToObj("show","hide","hideIfClickOutside","keydownHandler","selectDate");this.build();this.selectDate();this.hide();};DateInput.DEFAULT_OPTS={month_names:["January","February","March","April","May","June","July","August","September","October","November","December"],short_month_names:["Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec"],short_day_names:["Sun","Mon","Tue","Wed","Thu","Fri","Sat"],start_of_week:1};DateInput.prototype={build:function(){var monthNav=$('<p class="month_nav">'+
'<span class="button prev" title="[Page-Up]">&#171;</span>'+
' <span class="month_name"></span> '+
'<span class="button next" title="[Page-Down]">&#187;</span>'+
'</p>');this.monthNameSpan=$(".month_name",monthNav);$(".prev",monthNav).click(this.bindToObj(function(){this.moveMonthBy(-1);}));$(".next",monthNav).click(this.bindToObj(function(){this.moveMonthBy(1);}));var yearNav=$('<p class="year_nav">'+
'<span class="button prev" title="[Ctrl+Page-Up]">&#171;</span>'+
' <span class="year_name"></span> '+
'<span class="button next" title="[Ctrl+Page-Down]">&#187;</span>'+
'</p>');this.yearNameSpan=$(".year_name",yearNav);$(".prev",yearNav).click(this.bindToObj(function(){this.moveMonthBy(-12);}));$(".next",yearNav).click(this.bindToObj(function(){this.moveMonthBy(12);}));var nav=$('<div class="nav"></div>').append(monthNav,yearNav);var tableShell="<table><thead><tr>";$(this.adjustDays(this.short_day_names)).each(function(){tableShell+="<th>"+this+"</th>";});tableShell+="</tr></thead><tbody></tbody></table>";this.dateSelector=this.rootLayers=$('<div class="date_selector"></div>').append(nav,tableShell).insertAfter(this.input);if($.browser.msie&&$.browser.version<7){this.ieframe=$('<iframe class="date_selector_ieframe" frameborder="0" src="#"></iframe>').insertBefore(this.dateSelector);this.rootLayers=this.rootLayers.add(this.ieframe);$(".button",nav).mouseover(function(){$(this).addClass("hover")});$(".button",nav).mouseout(function(){$(this).removeClass("hover")});};this.tbody=$("tbody",this.dateSelector);this.input.change(this.bindToObj(function(){this.selectDate();}));this.selectDate();},selectMonth:function(date){var newMonth=new Date(date.getFullYear(),date.getMonth(),1);if(!this.currentMonth||!(this.currentMonth.getFullYear()==newMonth.getFullYear()&&this.currentMonth.getMonth()==newMonth.getMonth())){this.currentMonth=newMonth;var rangeStart=this.rangeStart(date),rangeEnd=this.rangeEnd(date);var numDays=this.daysBetween(rangeStart,rangeEnd);var dayCells="";for(var i=0;i<=numDays;i++){var currentDay=new Date(rangeStart.getFullYear(),rangeStart.getMonth(),rangeStart.getDate()+i,12,00);if(this.isFirstDayOfWeek(currentDay))dayCells+="<tr>";if(currentDay.getMonth()==date.getMonth()){dayCells+='<td class="selectable_day" date="'+this.dateToString(currentDay)+'">'+currentDay.getDate()+'</td>';}else{dayCells+='<td class="unselected_month" date="'+this.dateToString(currentDay)+'">'+currentDay.getDate()+'</td>';};if(this.isLastDayOfWeek(currentDay))dayCells+="</tr>";};this.tbody.empty().append(dayCells);this.monthNameSpan.empty().append(this.monthName(date));this.yearNameSpan.empty().append(this.currentMonth.getFullYear());$(".selectable_day",this.tbody).click(this.bindToObj(function(event){this.changeInput($(event.target).attr("date"));}));$("td[date="+this.dateToString(new Date())+"]",this.tbody).addClass("today");$("td.selectable_day",this.tbody).mouseover(function(){$(this).addClass("hover")});$("td.selectable_day",this.tbody).mouseout(function(){$(this).removeClass("hover")});};$('.selected',this.tbody).removeClass("selected");$('td[date='+this.selectedDateString+']',this.tbody).addClass("selected");},selectDate:function(date){if(typeof(date)=="undefined"){date=this.stringToDate(this.input.val());};if(!date)date=new Date();this.selectedDate=date;this.selectedDateString=this.dateToString(this.selectedDate);this.selectMonth(this.selectedDate);},changeInput:function(dateString){this.input.val(dateString).change();this.hide();},show:function(){this.rootLayers.css("display","block");$([window,document.body]).click(this.hideIfClickOutside);this.input.unbind("focus",this.show);$(document.body).keydown(this.keydownHandler);this.setPosition();},hide:function(){this.rootLayers.css("display","none");$([window,document.body]).unbind("click",this.hideIfClickOutside);this.input.focus(this.show);$(document.body).unbind("keydown",this.keydownHandler);},hideIfClickOutside:function(event){if(event.target!=this.input[0]&&!this.insideSelector(event)){this.hide();};},insideSelector:function(event){var offset=this.dateSelector.position();offset.right=offset.left+this.dateSelector.outerWidth();offset.bottom=offset.top+this.dateSelector.outerHeight();return event.pageY<offset.bottom&&event.pageY>offset.top&&event.pageX<offset.right&&event.pageX>offset.left;},keydownHandler:function(event){switch(event.keyCode)
{case 9:case 27:this.hide();return;break;case 13:this.changeInput(this.selectedDateString);break;case 33:this.moveDateMonthBy(event.ctrlKey?-12:-1);break;case 34:this.moveDateMonthBy(event.ctrlKey?12:1);break;case 38:this.moveDateBy(-7);break;case 40:this.moveDateBy(7);break;case 37:this.moveDateBy(-1);break;case 39:this.moveDateBy(1);break;default:return;}
event.preventDefault();},stringToDate:function(string){var matches;if(matches=string.match(/^(\d{1,2}) ([^\s]+) (\d{4,4})$/)){return new Date(matches[3],this.shortMonthNum(matches[2]),matches[1],12,00);}else{return null;};},dateToString:function(date){if(date.getDate()<10)
return"0"+date.getDate()+"/"+this.short_month_names[date.getMonth()]+"/"+date.getFullYear();else
return date.getDate()+"/"+this.short_month_names[date.getMonth()]+"/"+date.getFullYear();},setPosition:function(){var offset=this.input.offset();this.rootLayers.css({top:offset.top+this.input.outerHeight(),left:offset.left});if(this.ieframe){this.ieframe.css({width:this.dateSelector.outerWidth(),height:this.dateSelector.outerHeight()});};},moveDateBy:function(amount){var newDate=new Date(this.selectedDate.getFullYear(),this.selectedDate.getMonth(),this.selectedDate.getDate()+amount);this.selectDate(newDate);},moveDateMonthBy:function(amount){var newDate=new Date(this.selectedDate.getFullYear(),this.selectedDate.getMonth()+amount,this.selectedDate.getDate());if(newDate.getMonth()==this.selectedDate.getMonth()+amount+1){newDate.setDate(0);};this.selectDate(newDate);},moveMonthBy:function(amount){var newMonth=new Date(this.currentMonth.getFullYear(),this.currentMonth.getMonth()+amount,this.currentMonth.getDate());this.selectMonth(newMonth);},monthName:function(date){return this.month_names[date.getMonth()];},bindToObj:function(fn){var self=this;return function(){return fn.apply(self,arguments)};},bindMethodsToObj:function(){for(var i=0;i<arguments.length;i++){this[arguments[i]]=this.bindToObj(this[arguments[i]]);};},indexFor:function(array,value){for(var i=0;i<array.length;i++){if(value==array[i])return i;};},monthNum:function(month_name){return this.indexFor(this.month_names,month_name);},shortMonthNum:function(month_name){return this.indexFor(this.short_month_names,month_name);},shortDayNum:function(day_name){return this.indexFor(this.short_day_names,day_name);},daysBetween:function(start,end){start=Date.UTC(start.getFullYear(),start.getMonth(),start.getDate());end=Date.UTC(end.getFullYear(),end.getMonth(),end.getDate());return(end-start)/86400000;},changeDayTo:function(dayOfWeek,date,direction){var difference=direction*(Math.abs(date.getDay()-dayOfWeek-(direction*7))%7);return new Date(date.getFullYear(),date.getMonth(),date.getDate()+difference);},rangeStart:function(date){return this.changeDayTo(this.start_of_week,new Date(date.getFullYear(),date.getMonth()),-1);},rangeEnd:function(date){return this.changeDayTo((this.start_of_week-1)%7,new Date(date.getFullYear(),date.getMonth()+1,0),1);},isFirstDayOfWeek:function(date){return date.getDay()==this.start_of_week;},isLastDayOfWeek:function(date){return date.getDay()==(this.start_of_week-1)%7;},adjustDays:function(days){var newDays=[];for(var i=0;i<days.length;i++){newDays[i]=days[(i+this.start_of_week)%7];};return newDays;}};$.fn.date_input=function(opts){return this.each(function(){new DateInput(this,opts);});};$.date_input={initialize:function(opts){$("input.date_input").date_input(opts);}};return DateInput;})(jQuery);