Unless you use a library there is no way to convert the value without manually splitting the string.
var year = +oDate.slice( 0, 4);
var month = +oDate.slice( 4, 2) - 1; // Month is zero-based.
var day = +oDate.slice( 6, 2);
var hour = +oDate.slice( 8, 2);
var minute = +oDate.slice(10, 2);
var second = +oDate.slice(12, 2);
// This will interpret the date as local time date.
var date = new Date(year, month, day, hour, minute, second);
// This will interpret the date as UTC date.
var utcDate = Date.UTC(year, month, day, hour, minute, second);