<script type="text/javascript">
function date_add(cast, value, obj)
{
if (!obj) return false;
if (typeof(obj) == "string")
obj = new Date(date_format(obj, "/"));
switch (cast) {
case "y":
obj.setFullYear(obj.getFullYear() + value);
break;
case "m":
obj.setMonth(obj.getMonth() + value);
break;
case "d":
obj.setDate(obj.getDate() + value);
break;
default:
return false;
}
return obj;
}
function date_format(obj, delimiter)
{
var dateObj;
if (typeof(obj) == "string") {
dateObj = new Date(obj.replace(/-/gi, "/"));
} else
dateObj = obj;
if (!dateObj) return '';
if (!delimiter) delimiter = "-";
var y = dateObj.getFullYear();
var m = dateObj.getMonth()+1;
var d = dateObj.getDate();
if (m.toString().length == 1) m = "0" + m;
if (d.toString().length == 1) d = "0" + d;