How do I add 2 date/times together?

I have to add the current time with another one.

For example, the time now is 10:30 on 21st July 2011.

I want to book a vehicle for today at 17:00, but 10:30 + $minHours < 17:00 which means that I cannot make the booking.

Here is my code:

var d = new Dat开发者_开发问答e();
var curr_day = d.getDay();
var curr_date = d.getDate();
var hours = d.getHours();
var minutes = d.getMinutes();
var curr_month = d.getMonth();
var curr_year = d.getFullYear();

a = d_names[curr_day] + ', ' 
    + curr_date + ' ' 
    + m_names[curr_month] + ' ' 
    + curr_year;

t1 = document.getElementById('min_hr');

if(a == e.value) 
{
    alert("please call reservation to make a booking for collection in the next 24 hours");
    return false;
} 
else 
{
    return true;
}

Try this.

d.setMinutes ( d.getMinutes() + 30 );

Check the properties of Date instance here Date - MDN Docs, especially the getters and setters there.

If you want to set the hours use

//An integer between 0 and 23, representing the hour
d.setHours ( d.getHours() + 2 );

The signature of the method is

setHours(hoursValue[, minutesValue[, secondsValue[, msValue]]])

Code for your exact requirement is this.

var $maxHour = 17; //5 PM
var $minHours = 3;
var $hourNow = new Date().getHours();
if( ( $minHours + $hourNow ) > $maxHour ){
    alert("Time is up.");
}
else{
    alert("Please book now");
}

You just make a new object. Above you refer to var d = new Date(); writing d.getDay();.

Now you make a new object: var d2 = new Date(/* something in here */); and refer to it by d2.getDay();

Is that an answer to your question?

edited. Now you can add any hours to your date:

var d = new Date();
var d2 = new Date();
d2.setHours(d.getHours() + 2);

• have one date object .
• Convert the time you want to add to it into number of minutes ( or seconds ) .
• Set the minutes(seconds) of the date object as it's original value + the value computed in Step 2.