you have to split it manually and use Date.UTC
for utc function like this:
var dateStr = document.getElementById("id_of_datepicker");
var dateArr = dateStr.split(/[\-T:]/);//suppose it is like 2014-06-12T00:00:00
var localTime=new Date(Date.parse(dateArr[0],dateArr[1],dateArr[2]), 0, 0, 0)
var utcTime=new Date(Date.UTC(dateArr[0],dateArr[1],dateArr[2]), 0, 0, 0)