Question

I am using a form to input date in text box format (mm/dd/yyyy) and the next text box I will enter how many days to add. This is should automatically calulate the no of days and display in 3rd text box. E.g

Text Box1: Input date (mm/dd/yyyy)
Text Box2: Input no of days
Text Box3: textbox1 value+textbox3 value

I need help to add dates.

I tried in onblur event in textbox2 using Javascript function

Code:

//text box2 event
    onblur="adddate(this.value)"
//javascript fn    
    function adddate(a) {
        var rdat=document.telstoe.rdate.value;
        if(a==2) {
            document.telstoe.tdate.value=rdat+2;
        }
    }

Input Values:
Textbox 1: 11/14/2012 (mm/dd/yyyy)
Textbox 2: 2 or 3 or 4
The output should be: only the days should be counted and displayed and I am getting like 1/14/2012*2*

Please help with the correct code

Answer 1

try this:

function adddate(a) {
    var tdate = document.telstoe.rdate.value;
    var theDate=new Date(tdate);
    theDate.setDate( theDate.getDate() + a );
    document.telstoe.tdate.value=(theDate.getMonth() + 1) + "/" + theDate.getDate() + "/" theDate.getFullYear();
}

and use this page for your reference:
http://www.w3schools.com/jsref/jsref_obj_date.asp

Please have a look at the object reference! It would be preferred for your own sake, to learn the javascript Date object. Good luck.