Increasing date through Expression builder?

Hi,
we have requirement of validating the date range.
The date entered should not be greater that 3 days of current(todays) date and min date should be be less that last three days.
I am using Daterangevalidator and i need to know how to set a EL expression to satisfy the above condition.
we have a current date in El coming from "#{bindings.startedDate.inputValue}" now i just want to know how to increase and decrease the days using EL.
<af:validateDateTimeRange
maximum="#{bindings.startedDate.inputValue + 3}"
minimum="#{bindings.startedDate.inputValue - 3}"
The above code is not working.
Edited by: user11285758 on Apr 25, 2013 7:45 PM

Thanks for your reply.....
When I put above code
<af:validateDateTimeRange
maximum="#{bindings.startedDate.inputValue + 259200000}"
minimum="#{bindings.startedDate.inputValue - 259200000}" />
and deploy the application to server. page is failing while loading at that particular code. Please find error below
ERROR:
]] Root cause of ServletException.
java.util.MissingResourceException: Can't find resource for bundle java.util.PropertyResourceBundle, key el.convert
at java.util.ResourceBundle.getObject(ResourceBundle.java:393)
at java.util.ResourceBundle.getString(ResourceBundle.java:353)
at com.sun.el.util.MessageFactory.getArray(MessageFactory.java:86)
at com.sun.el.util.MessageFactory.get(MessageFactory.java:66)
at com.sun.el.lang.ELArithmetic.coerce(ELArithmetic.java:384)
Truncated. see log file for complete stacktrace
Any idea what needs to be done to fix the issue?
Edited by: user11285758 on Apr 28, 2013 9:38 PM
Edited by: user11285758 on Apr 28, 2013 9:39 PM

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You Missed END key word in the statement.Sorry,I mistake copy & paste only.
So,The problem is still not resolved.
The following shows, that the error has been corrected in the first message.
Dear all
I am Michel.
When I was always trouble,
everyone will go to support this Forum, I am glad.
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