comparing times in javascript???

[Brian]

I need to be able to only allow my clients to enter data into a part
of a form between specific hours of the day. i can find tons of
articles on comparing dates, but not times. does anyone know how to
do this?

this is what i came up with, but its obviously not right. thanks in
advance

var a_p = "";
var d = new Date();

var curr_hour = d.getHours();

if (curr_hour < 12)
{
a_p = "AM";
}
else
{
a_p = "PM";
}
if (curr_hour == 0)
{
curr_hour = 12;
}
if (curr_hour > 12)
{
curr_hour = curr_hour - 12;
}

var curr_min = d.getMinutes();

curr_min = curr_min + "";

if (curr_min.length == 1)
{
curr_min = "0" + curr_min;
}

var curr_time = curr_hour +":"+curr_min+" "+a_p;
alert(curr_time);




if (curr_time > '8:59 AM' ) && (curr_time < '1:01 PM' ) {


alert("ok");
} else {


alert("nope");
}

 

[Guest]

All that is much too complex. What does the comparison operator know about
AM and PM?

Get the current hour and minute (as you said) and calculate
60*hour+minutes. Compare that to the start and end times in minutes past
previous midnight (=0).

Be sure to account for local/GMT time with the time function.

 

[Dr J R Stockton]

In comp.lang.javascript message <u113c4lcklncsr1fc72nal0rmgnq89iab3@4ax.
com>, Fri, 5 Sep 2008 19:11:44, (e-mail address removed) posted:

Get the current hour and minute (as you said) and calculate
60*hour+minutes. Compare that to the start and end times in minutes past
previous midnight (=0).

D = new Date()
X = 100*D.getHours() + D.getMinutes()
OK = X > 0900 && X < 1300

There is no need for the limitation to 60 minutes in every hour! This
form allows times to be entered as normal un-separated 24-hour clock
figures. It assumes that the OP's "between" means "between"; possibly
one or other bound should really be inclusive.

Perhaps the OP did not try a search for javascript "time comparison" .

On the Web, users are not necessarily local, and it may be better to
work in UTC.

Using AM & PM in data processing is sheer folly.

It's a good idea to read the newsgroup c.l.j and its FAQ. See below.

 

[Guest]

There is no need for the limitation to 60 minutes in every hour! This
form allows times to be entered as normal un-separated 24-hour clock
figures.

That is nice.

Perhaps the OP did not try a search for javascript "time comparison" .

You get first few hits.

On the Web, users are not necessarily local, and it may be better to
work in UTC.

That up to the OP -- the requirement might be local or otherewise.

Using AM & PM in data processing is sheer folly.

Definitely