Validate a SharePoint Date Field against Current Date in Javascript

Consider the following scenario:

You have a SharePoint Site which has its regional settings set to English (UK) - so that the date format becomes dd/mm/yyyy in all date pickers
You would like to validate a particular date field in your List or Document Library against the current date
If the validation does not pass, you should not allow the form to save

So what the script does is:

Uses the sputility (check my previous posts and also look at http://sputility.codeplex.com) to get the particular SharePoint date field
It comes out as a date datatype, so I cast it to string
Since the format is in dd/mm/yyyy and Javascript compare and date functions work only with mm/dd/yyyy, I am converting them back to that format
then using UTC string conversions and comparing...

Enjoy!

function PreSaveAction() {

var createdate = SPUtility.GetSPField('Date of Creation').GetValue();

var createdatestr=createdate.toString();

var dt1 = createdatestr.substring(0,2);

var mon1 = createdatestr.substring(3,5);

var yr1 = createdatestr.substring(6,10);

temp1 = mon1 + "/" + dt1 + "/" + yr1;

var dtCr = new Date(temp1);

var CreatedDateInUTC = dtCr.toUTCString();

var currentTime = new Date();

var CurDateInUTC = currentTime.toUTCString();

var dt3 = new Date(CreatedDateInUTC);

var dt4 = new Date(CurDateInUTC);

if(dt3 > dt4){

alert('Date of Creation cannot be greater than Current Date!');

return false;

}

return true;

} </script>

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