Compare Input Date with Today Date using Javascript

function checkDateInpuWithTodays() {

 var todayDate = new Date();

 var todayMonth = todayDate.getMonth() + 1;

 var todayDay = todayDate.getDate();

 var todayYear = todayDate.getFullYear();

 var todayDateText = todayDay + "/" + todayMonth + "/" + todayYear;

 var inputDateText = document.getElementById('<%= datepicker.ClientID %>' + '_' + '<%= datepicker.ID %>' + 'Date').value;

 var inputToDate = Date.parse(inputDateText);

 var todayToDate = Date.parse(todayDateText);

 if (inputToDate > todayToDate) {alert("the input is later than today");}

 else if (inputToDate < todayToDate) {alert("the input is earlier than today");}

 else {alert("the input is same as today");}

 }