Utility of JavaScript

JsUtil.js

    // convert from date format string to date
    var convertDateFromStr = function(dateStr) {
      var newDt = new Date();
     
      var reg = new RegExp('\\-|\\/|\\s|T');
      var dt = dateStr.split(reg, 4);

      if(dt.length > 2) {
        newDt = new Date(dt[0], dt[1]-1, dt[2]);

        if(dt.length > 3) {
          var tm = dt[3].split(':', 3);
          if(tm.length == 3) {
            newDt = new Date(dt[0], dt[1]-1, dt[2], tm[0], tm[1], tm[2]);
          } else if (tm.length == 2) {
            newDt = new Date(dt[0], dt[1]-1, dt[2], tm[0], tm[1]);
          }
        }
      }

      return newDt;
    }