CRM - Set the Time portion of a Date ONLY Field

I have a date field in CRM (Agreement Date) if some users in East Coast enter a date to this field and I opened it in Pacific Time Zone (Seattle) there is one day difference. They entered agreement data as 1/1/1014 EST but I am seeing it at 12/31/2013 PST. Is there a java script to make this time difference to look same for all user when they open this account record? 

FYI: new_agreementdate is Data and Time type with Date only Format on account record

I use the following code but it doesn’t work….. Any idea?

function Form_Create()

{

var oDate; 

                   oDate =  Xrm.Page.getAttribute("new_agreementdate").getValue() ;

                   if (oDate != null) {     

                            oDate = new Date(oDate);                   

                           oDate = oDate.setHours(12,0,0);

                          }}

Thanks,