JavaScript DateUtils

function DateUtils(){

this.dataObj = new Date();

this.now = this.dataObj.getFullYear() + "-" + ((this.dataObj.getMonth()+1) > 9 ? (this.dataObj.getMonth()+1) : ("0" + (this.dataObj.getMonth()+1))) + "-" + (this.dataObj.getDate() > 9 ? this.dataObj.getDate() : ("0" + this.dataObj.getDate()));

this.firstDay = this.dataObj.getFullYear() + "-01-01";

this.getNow = function() {
return this.now;
}
this.getFirstDay = function() {
return this.firstDay;
}
}