MDN: Date.toISOString / Feb 21, 2012 9:10:54 PM, MrDanielLewis; Public Domain; ECMAScript 5+; ISO 8601 extended; http://developer.mozilla.org/en/docs/JavaScript/Reference/Global_Objects/Date/toISOString#Compatibility

Date-toISOString-ecmacript-5-shim.js

if ( !Date.prototype.toISOString ) {
     
    ( function() {
     
        function pad(number) {
            var r = String(number);
            if ( r.length === 1 ) {
                r = '0' + r;
            }
            return r;
        }
  
        Date.prototype.toISOString = function() {
            return this.getUTCFullYear()
                + '-' + pad( this.getUTCMonth() + 1 )
                + '-' + pad( this.getUTCDate() )
                + 'T' + pad( this.getUTCHours() )
                + ':' + pad( this.getUTCMinutes() )
                + ':' + pad( this.getUTCSeconds() )
                + '.' + String( (this.getUTCMilliseconds()/1000).toFixed(3) ).slice( 2, 5 )
                + 'Z';
        };
   
    }() );
}


/*
 Date.toISOString shim: Feb 21, 2012 9:10:54 PM, MrDanielLewis,
 "Any copyright is dedicated to the Public Domain."
 http://developer.mozilla.org/en/docs/JavaScript/Reference/Global_Objects/Date/toISOString#Compatibility
 http://developer.mozilla.org/en/docs/JavaScript/Reference/Global_Objects/Date#Example.3A_ISO_8601_formatted_dates
*/


var today = new Date("05 October 2011 14:48 UTC");
alert(today.toISOString()); // Returns 2011-10-10T14:48:00.000Z