function validateDates(msg, form)
	{	
		var startDay = form.startDateDay.value;
		var endDay = form.endDateDay.value;
		
		var startMY = form.startDateMonthYear.value;
		var endMY = form.endDateMonthYear.value;
		
		var startMonth = "";
		var startYear = "";
		var endMonth = "";
		var endYear = "";		
				
		var badDate = false;
		// Check that the dates have been selected
        if (startMY == "" || startDay < 1)
        {
        	msg = msg + "\n" + "Please enter a valid move-in date";
            badDate = true;
        }

        if (endMY == "" || endDay < 1)
        {
        	msg = msg + "\n" + "Please enter a valid move-out date";
            badDate = true;
        }
 
 		// Check that the dates are valid dates
 		if (!badDate)
        {
        	var startH = startMY.indexOf("_");
        	var endH = endMY.indexOf("_");
        	
        	startMonth = startMY.substring(0, startH) - 0.0 + 1;
        	startYear = startMY.substring(startH + 1, startMY.length);
        	
        	endMonth = endMY.substring(0, endH) - 0.0 + 1;
        	endYear = endMY.substring(endH + 1, endMY.length);       
        	        
        	if (!isValidDate(startDay, startMonth, startYear))
        	{
	        	msg = msg + "\n" + "Please enter a valid move-in date";
	            badDate = true;
        	}
        	
        	if (!isValidDate(endDay, endMonth, endYear))
        	{
	        	msg = msg + "\n" + "Please enter a valid move-out date";
	            badDate = true;
        	}        
	        
	        if (!badDate)
	        {	        
	        	// Check that the start date is not in the past
	        	var today = new Date();	        	
	        	if(!isValidDateRange(today.getDate(), today.getMonth() + 1, today.getFullYear(), startDay, startMonth, startYear))
	        	{
	        		msg = msg + "\n" + "The Move-In Date cannot be in the past";
	        	}
	        	// Check that the start date is before the end date
	        	else if (!isValidDateRange(startDay, startMonth, startYear, endDay, endMonth, endYear))
	        	{
		        	msg = msg + "\n" + "The Move-In Date cannot be after the Move-Out Date";
	        	}
	        }
        }
	
		return msg;
	}
	
	function updateEndDate(form)
	{	
		var startDay = form.startDateDay.value;		
		var startMY = form.startDateMonthYear.value;		
    	var startH = startMY.indexOf("_");
    	
    	if (startH > 0)
    	{
	    	var startMonth = startMY.substring(0, startH) - 0.0 + 1;
	    	var startYear = startMY.substring(startH + 1, startMY.length);
	    			
			var nextMonth = oneMonthFromNow(startDay, startMonth, startYear);
					
			if (nextMonth != null)
			{	
				var endMonthYear = nextMonth.getMonth() + "_" + nextMonth.getFullYear();			
					
				if (isValueInGroup(form.startDateMonthYear, endMonthYear))	
				{	
					form.endDateDay.value = nextMonth.getDate();
					form.endDateMonthYear.value = endMonthYear;
				}
				else
				{	
					// last month was chosen... 
					form.endDateDay.value = form.startDateDay.value;
					form.endDateMonthYear.value = form.startDateMonthYear.value;
				}
			}
		}
		
		// Also need to update the number of days for the end date, in case it's changed
		updateEndDaysForMonth(form);
	}
		
	function updateDayOptions(dayElement, length, selectedValue)	
	{	
		// Set to lenght + 1 to leave in default value
		dayElement.length=length + 1;
		
		selectedValue = selectedValue - 0;
		if (selectedValue > length)
			selectedValue = length;
		
		for (i=1; i<length+1; i++)
		{
			var selected = (i == selectedValue);
			dayElement.options[i] = new Option(i, i, false, selected);
		}
	}
		
	function updateStartDaysForMonth(form)
	{	
		var startDay = form.startDateDay.value;		
		var startMY = form.startDateMonthYear.value;
		
		var startMonth = "";
		var startYear = "";	
		
        var startH = startMY.indexOf("_");
        	
        if (startH > 0)
        {	
        	startMonth = startMY.substring(0, startH) - 0.0 + 1;
			startYear = startMY.substring(startH + 1, startMY.length) - 0.0;
			
			var lastDay = getLastDayThisMonth(startMonth, startYear);
			
			updateDayOptions(form.startDateDay, lastDay, startDay);
		}
	}
		
	function updateEndDaysForMonth(form)
	{	
		var endDay = form.endDateDay.value;		
		var endMY = form.endDateMonthYear.value;
		
		var endMonth = "";
		var endYear = "";	
		
        var endH = endMY.indexOf("_");
        	
        if (endH > 0)
        {	
        	endMonth = endMY.substring(0, endH) - 0.0 + 1;
			endYear = endMY.substring(endH + 1, endMY.length) - 0.0;
			
			var lastDay = getLastDayThisMonth(endMonth, endYear);
			
			updateDayOptions(form.endDateDay, lastDay, endDay);
		}
	}