Set minimum days difference between jquery ui datepickers - jquery-ui-datepicker

Question

I have two date pickers that I use to select a date range. Here is the code for them:
$("#ContentPlaceHolder1_MySearchBox_txtOutDate").datepicker({
changeMonth: true,
numberOfMonths: 1,
dateFormat: 'dd-M-yy',
onClose: function (selectedDate) {
$("#ContentPlaceHolder1_MySearchBox_txtInDate").datepicker("option", "minDate", selectedDate);
DoPostBack();
},
beforeShow: function () {
setTimeout(function () {
$('.ui-datepicker').css('z-index', 99999999999999);
}, 0);
}
}).val();
$("#ContentPlaceHolder1_MySearchBox_txtInDate").datepicker({
changeMonth: true,
numberOfMonths: 1,
dateFormat: 'dd-M-yy',
onClose: function (selectedDate) {
$("#ContentPlaceHolder1_MySearchBox_txtOutDate").datepicker("option", "maxDate", selectedDate);
DoPostBack();
},
beforeShow: function () {
setTimeout(function () {
$('.ui-datepicker').css('z-index', 99999999999999);
}, 0);
}
}).val();
The code works fine when it comes to not allowing the InDate from being lower than the OutDate. But I need to set the minimum value for InDate to be at least 3 days after the OutDate. I tried using New Date(selectedDate) to add 3 days but it didn't work because "selectedDate" is a string of dd-MMM-YYYY format and it won't convert to date.
What is the simplest method to achieve what I am after?
Thanks

Answer 1

OK. I found a solution using the following functions:
function parseDate(input) {
var parts = input.split('-');
return new Date(parts[2], MonthNameToNumber(parts[1]) - 1, parts[0]);
}
function MonthNameToNumber(MonthName) {
switch(MonthName) {
case "Jan":
return 1;
break;
case "Feb":
return 2;
break;
case "Mar":
return 3;
break;
case "Apr":
return 4;
break;
case "May":
return 5;
break;
case "Jun":
return 6;
break;
case "Jul":
return 7;
break;
case "Aug":
return 8;
break;
case "Sep":
return 9;
break;
case "Oct":
return 10;
break;
case "Nov":
return 11;
break;
case "Dec":
return 12;
break;
default:
return 1;
}
}
And then changing:
$("#ContentPlaceHolder1_MySearchBox_txtInDate").datepicker("option", "minDate", selectedDate);
to
var OutDate = parseDate(selectedDate);
OutDate.setDate(OutDate.getDate() + 3);
$("#<%=txtInDate.ClientID%>").datepicker("option", "minDate", OutDate);
and
$("#ContentPlaceHolder1_MySearchBox_txtOutDate").datepicker("option", "maxDate", selectedDate);
to
var InDate = parseDate(selectedDate);
InDate.setDate(InDate.getDate() - 3);
$("#<%=txtOutDate.ClientID%>").datepicker("option", "maxDate", InDate);