[SalesForce] apex:actionFunction to return value from Controller

Found out what the problem was and thought I'd post it here in case anyone else has the same issue. Because the start and end were objects (moment), they weren't casting properly to the controller properties. My solution was:

Javascript:

select: function(start, end, jsEvent, view) {
    setStartEndDatesAF(start.format('YYYY-MM-DD HH:mm:ss'), end.format('YYYY-MM-DD HH:mm:ss'));
},

Controller:

public String StartDateTime {get; set;}
public DateTime startDt {get; set;}

public String EndDateTime {get; set;}
public DateTime endDt {get; set;}

public PageReference setStartEndDates() {
    startDt = DateTime.valueOf(StartDateTime);
    endDt = DateTime.valueOf(EndDateTime);
    //FullCalendar selected end is exclusive - deduct 1 second to get inclusive end
    endDt = endDt.addSeconds(-1);
    return null;
}

You should be able to get the value of the account field by the following, Typically I like to give my form an id as well so if you were to go

<apex:form id="form1">

The following javascript is what you would want to use to get the

document.getElementById('{!$Component.form1.Saveblock.pbsectn.pbs1.acc}').value

for more information look at the section: Using $Component to Reference Components from JavaScript in the developer guide.

http://www.salesforce.com/us/developer/docs/pages/