'var' question

[Prophet]

I am using the following for a different picture to show up every day....

<script language="JavaS cript">
<!--
function adspic() {

var mydate=new Date()
var day=mydate.getD ay()
var month=mydate.ge tMonth()
var daym=mydate.get Date()
if (daym<10)
daym="0"+daym
var adspicarray=new Array("ads/images/kilt.jpg",
"ads/images/kilt.jpg",
"ads/images/kilt.jpg",
"ads/images/apronandcase.jp g",
"ads/images/kilt.jpg",
"ads/images/apronandcase.jp g",
"ads/images/apronandcase.jp g")

document.write( "<p align='right'>< img src = '" + adspicarray[day] +
"'/>")}
// -->
</script>
Question (1)
How do I do it so that it is random??

Question (2)
How do i make it so that [day] can be used in other functions (currently i
use the same 'var' sequence in each function

[petermichaux]

> How do I do it so that it is random??

It will be something like the following untested code.
<script type='text/javascript'>

function adspic() {
var adspicarray=["ads/images/kilt.jpg",
"ads/images/kilt.jpg",
"ads/images/kilt.jpg",
"ads/images/apronandcase.jp g",
"ads/images/kilt.jpg",
"ads/images/apronandcase.jp g",
"ads/images/apronandcase.jp g"];

document.write( "<p align='right'>< img src = '" +
adspicarray[Math.floor(7*Ma th.random())] +"'/>");
}

</script>

Don't bother with the language attribute it is deprecated. Use they
type attribute instead. Also the <!----> is not necessary anymore
apparently. Also don't forget semi-colons at the end of your
statements. Also you can use array literal notation instead of new
Array(). Try putting your orignial code in http://www.jslint.com for
suggestions on improving syntax.

Peter

[petermichaux]

JimK wrote:

var day = Math.round(Math .random() * 5)
day is variable of the day of the week (0 = Sunday - 6 = Saturday).

With this random number generation you will never generate a 6. Also 0
and 5 will occur with half the frequency of 1,2,3,4.

Peter

[petermichaux]

JimK wrote:

var day = Math.round(Math .random() * 6) // 6 images
day is variable of the day of the week (0 = Sunday - 6 = Saturday).

Now pictures 0 and 6 will appear with half the frequency of days
1,2,3,4,5

(0-0.5) --> 0
[0.5-1.5) --> 1
[1.5-2.5) --> 2
[2.5-3.5) --> 3
[3.5-4.5) --> 4
[4.5-5.5) --> 5
[5.5-6) --> 6

[Randy Webb]

pe**********@gm ail.com said the following on 5/27/2006 1:52 AM:

How do I do it so that it is random??
It will be something like the following untested code.
<script type='text/javascript'>

function adspic() {
var adspicarray=["ads/images/kilt.jpg",
"ads/images/kilt.jpg",
"ads/images/kilt.jpg",
"ads/images/apronandcase.jp g",
"ads/images/kilt.jpg",
"ads/images/apronandcase.jp g",
"ads/images/apronandcase.jp g"];

document.write( "<p align='right'>< img src = '" +
adspicarray[Math.floor(7*Ma th.random())] +"'/>");

adspicarray[Math.floor(adsp icarray.length* Math.random())]
Also don't forget semi-colons at the end of your statements.

Unless you know where they make a difference, you are generally better
off without trailing semicolons than with them. They are optional.

--
Randy
comp.lang.javas cript FAQ - http://jibbering.com/faq & newsgroup weekly
Javascript Best Practices - http://www.JavascriptToolbox.com/bestpractices/

[Randy Webb]

JimK said the following on 5/27/2006 2:44 AM:

On 26 May 2006 23:06:59 -0700, pe**********@gm ail.com wrote:

JimK wrote:

var day = Math.round(Math .random() * 5)
day is variable of the day of the week (0 = Sunday - 6 = Saturday).

With this random number generation you will never generate a 6. Also 0
and 5 will occur with half the frequency of 1,2,3,4.

Peter

Your right, took me a minute to figure out why. I was thinking about
using Math.floor. I mis-counted the images in the array which I
corrected

Instead of hard coding the images, use the arrayName.lengt h property and
then all it takes to add images is another entry into the array.

--
Randy
comp.lang.javas cript FAQ - http://jibbering.com/faq & newsgroup weekly
Javascript Best Practices - http://www.JavascriptToolbox.com/bestpractices/

[Prophet]

So now how do I build the Var in so that it can be used in multiple
functions as I currently type the same code into each individual function

"Prophet" <M_*****@hotmai l.com> wrote in message
news:qdRdg.1057 $kK6.1032@edtnp s89...

I am using the following for a different picture to show up every day....

<script language="JavaS cript">
<!--
function adspic() {

var mydate=new Date()
var day=mydate.getD ay()
var month=mydate.ge tMonth()
var daym=mydate.get Date()
if (daym<10)
daym="0"+daym
var adspicarray=new Array("ads/images/kilt.jpg",
"ads/images/kilt.jpg",
"ads/images/kilt.jpg",
"ads/images/apronandcase.jp g",
"ads/images/kilt.jpg",
"ads/images/apronandcase.jp g",
"ads/images/apronandcase.jp g")

document.write( "<p align='right'>< img src = '" + adspicarray[day] +
"'/>")}
// -->
</script>
Question (1)
How do I do it so that it is random??

Question (2)
How do i make it so that [day] can be used in other functions (currently i
use the same 'var' sequence in each function

[Dr John Stockton]

JRS: In article <h9************ *************** *****@4ax.com>, dated
Sat, 27 May 2006 05:59:06 remote, seen in news:comp.lang. javascript,
JimK <1a****@gmail.c om> posted :

var day = Math.round(Math .random() * 5)

Reading the newsgroup FAQ *before* giving "advice" may help you to give
an illusion of competence.

R = Math.random()*5 |0

<FAQENTRY>
The FAQ has AFAICS no example of any of the single-character logical
operators; one could be placed in 4.22.

--
© John Stockton, Surrey, UK. ?@merlyn.demon. co.uk Turnpike v4.00 IE 4 ©
<URL:http://www.jibbering.c om/faq/> JL/RC: FAQ of news:comp.lang. javascript
<URL:http://www.merlyn.demo n.co.uk/js-index.htm> jscr maths, dates, sources.
<URL:http://www.merlyn.demo n.co.uk/> TP/BP/Delphi/jscr/&c, FAQ items, links.

[Lasse Reichstein Nielsen]

JimK <1a****@gmail.c om> writes:

?? for you. Far as I know JS has no way to work with binary numbers
like 00000000b directly, is this correct?

There is no way to specify that a number literal should be read as
an integer, and not a floating point number.
However, some operations implicitly convert their arguments to
a 32-bit integer. These are mainly the bit-operations: bitwise and,
bitwise or, bitwise xor, and the shifts.

/L
--
Lasse Reichstein Nielsen - lr*@hotpop.com
DHTML Death Colors: <URL:http://www.infimum.dk/HTML/rasterTriangleD OM.html>
'Faith without judgement merely degrades the spirit divine.'

[VK]

Lasse Reichstein Nielsen wrote:

There is no way to specify that a number literal should be read as
an integer, and not a floating point number.
However, some operations implicitly convert their arguments to
a 32-bit integer. These are mainly the bit-operations: bitwise and,
bitwise or, bitwise xor, and the shifts.

Would it lead to implications if used in the reverse order?
0|510

In such case it could be used as a pseudo-allocator to use together
with say 0x1FE and 0776