Date.prototype.setISO8601 = function(dString){    
  var regexp = /(\d\d\d\d)(-)?(\d\d)(-)?(\d\d)(T)?(\d\d)(:)?(\d\d)(:)?(\d\d)(\.\d+)?(Z|([+-])(\d\d)(:)?(\d\d))/;  
  
  if (dString.toString().match(new RegExp(regexp))) {  
    var d = dString.match(new RegExp(regexp));  
    var offset = 0;  
  
    this.setUTCDate(1);  
    this.setUTCFullYear(parseInt(d[1],10));  
    this.setUTCMonth(parseInt(d[3],10) - 1);  
    this.setUTCDate(parseInt(d[5],10));  
    this.setUTCHours(parseInt(d[7],10));  
    this.setUTCMinutes(parseInt(d[9],10));  
    this.setUTCSeconds(parseInt(d[11],10));  
    if (d[12])  
      this.setUTCMilliseconds(parseFloat(d[12]) * 1000);  
    else  
      this.setUTCMilliseconds(0);  
    if (d[13] != 'Z') {  
      offset = (d[15] * 60) + parseInt(d[17],10);  
      offset *= ((d[14] == '-') ? -1 : 1);  
      this.setTime(this.getTime() - offset * 60 * 1000);  
    }  
  }  
  else {  
    this.setTime(Date.parse(dString));  
  }  
  return this;  
};