Populated Date in Text Field

This question already has an answer here:

How do I get the current date in JavaScript? 39 answers

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Date.getMonth:

The value returned by getMonth is an integer between 0 and 11. 0 corresponds to January, 1 to February, and so on.

Reference.

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HTML Element:

<p>Today's Date<br />
<input id="date" type="text" name="curDate" size="50" /><br />
Pick-up Date<br />
<input type='text' name='duedateField' id='duedateField' value='' /></p>

Use this javascript:

var month = Date.getMonth();
var date = Date.getDate();
var year = Date.getYear();
var deliverymonth;
var deliverydate;
var deliveryyear;    


var message = month + "/" + date + "/" + year;
document.getElementById('date').innerHTML=message;
if(month == 11 && date >= 29){
    deliveryyear = year + 1;
    deliverymonth = 1;
    deleverydate = date - 28;
}else{


     switch(month)
    {
        case 0,2,4,6,7,9,11:
             if(date >= 29){
                 deliverymonth = month + 1;
                 deliverydate = date - 28;
             }else{
                 deliverydate = date + 3;
             }
             break;
         case 3,5,8,10:
             if(date >= 28){
                 deliverymonth = month + 1;
                 deliverydate = date - 27;
             }else{
                 deliverydate = date + 3;
             }
             break;
          case 1:
             if(date >= 26){
                 deliverymonth = month + 1;
                 deliverydate = date - 25;
             }else{
                 deliverydate = date + 3;
             }
             break;
          default:
             break;
          }
var deliverymessage = deliverymonth + "/" + deliverydate + "/" + deliveryyear;
document.getElementById('duedateField').innerHTML=deliverymessage;

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