var Event = YAHOO.util.Event;
var Dom = YAHOO.util.Dom;

function showCalender(inputID, showBtn, MinDate){
	var dialog;
	var calendar;

	 // Lazy Dialog Creation - Wait to create the Dialog, and setup document click listeners, until the first time the button is clicked.
	if (!dialog) {
	
	     // Hide Calendar if we click anywhere in the document other than the calendar
		Event.on(document, "click", function(e) {
		    var el = Event.getTarget(e);
		    var dialogEl = dialog.element;
		    if (el != dialogEl && !Dom.isAncestor(dialogEl, el) && el != showBtn && !Dom.isAncestor(showBtn, el)) {
		        dialog.hide();
		    }
		});

		function resetHandler() {
		    // Reset the current calendar page to the select date, or 
		    // to today if nothing is selected.
		    var selDates = calendar.getSelectedDates();
		    var resetDate;
		
		    if (selDates.length > 0) {
		        resetDate = selDates[0];
		    } else {
		        resetDate = calendar.today;
		    }
		
		    calendar.cfg.setProperty("pagedate", resetDate);
		    calendar.render();
		    
		    Dom.get(inputID).value = "";
		    dialog.hide();
		}
		
		function closeHandler() {
		    dialog.hide();
		}

        dialog = new YAHOO.widget.Dialog("container", {
            visible:false,
            context:[showBtn, "tr", "bl"],
            buttons:[ {text:"Reset", handler: resetHandler, isDefault:true}, {text:"Close", handler: closeHandler}],
            draggable:false,
            close:true
        });
        dialog.setHeader('Pick A Date');
        dialog.setBody('<div id="cal"></div>');
        dialog.render(document.body);

        dialog.showEvent.subscribe(function() {
            if (YAHOO.env.ua.ie) {
                // Since we're hiding the table using yui-overlay-hidden, we 
                // want to let the dialog know that the content size has changed, when
                // shown
                dialog.fireEvent("changeContent");
            }
        });
    }

    // Lazy Calendar Creation - Wait to create the Calendar until the first time the button is clicked.
	if (!calendar) {

		calendar = new YAHOO.widget.Calendar("cal");
		calendar.cfg.setProperty("iframe","false",false);
		calendar.cfg.setProperty("start_weekday","6",false);
		calendar.cfg.setProperty("hide_blank_weeks","true",false);
		if (typeof(MinDate) != 'undefined')
			calendar.cfg.setProperty("mindate",MinDate,false);
        calendar.render();

        calendar.selectEvent.subscribe(function() {
            if (calendar.getSelectedDates().length > 0) {

                var selDate = calendar.getSelectedDates()[0];

                // Pretty Date Output, using Calendar's Locale values: Friday, 8 February 2008
                var wStr = calendar.cfg.getProperty("WEEKDAYS_LONG")[selDate.getDay()];
                var dStr = selDate.getDate();
                var mStr = calendar.cfg.getProperty("MONTHS_LONG")[selDate.getMonth()];
                var yStr = selDate.getFullYear();

				if (dStr <= 9){
					dStr = "0" + dStr;  	
				}
				
                Dom.get(inputID).value = dStr + "-" + mStr + "-" + yStr;
            } else {
                Dom.get(inputID).value = "";
            }
            dialog.hide();
        });

        calendar.renderEvent.subscribe(function() {
            // Tell Dialog it's contents have changed, which allows 
            // container to redraw the underlay (for IE6/Safari2)
            dialog.fireEvent("changeContent");
        });
    }

    var seldate = calendar.getSelectedDates();

    if (seldate.length > 0) {
        // Set the pagedate to show the selected date if it exists
        calendar.cfg.setProperty("pagedate", seldate[0]);
        calendar.render();
    }

	dialog.show();
}