JavaScript获取当前日期与日期的比较

var cDate = new Date();
var today = (cDate.getMonth() + 1) + "-" + cDate.getDate()+ "-" + cDate.getFullYear();
var best_time = document.getElementById("best_time").value;
best_time = best_time.split("-");
best_time = best_time[1] + "-" + best_time[2] + "-" + best_time[0];
if (best_time != "" && Date.parse(best_time) < Date.parse(today))
{
   validator.addErrorMsg("错误的要求送货时间");
}