random link form current page

[Papa Legba]

I have huge page of links, to whcih I am currently adding. I would
like to add a "random link" button which would parse the current page,
extract all URLs then load a random link.

Before I start to code, does such s thing already exist.

Thanks in advance...

[Geir Andersen]

Re: random link form current page

Hi, such scripts already exist for the most purposes.
Displaying random quotes, links, images, etc.
A start is to look through the category: Randomizing, at hotscripts.com

http://www.hotscripts.com/PHP/Scripts_and_Programs/Randomizing/index.html

Another tip is to google for something like: PHP Code Display random link

http://www.google.com/search?hl=en&lr=&safe=off&q=PHP+Code+Display+random+link&btnG=Search

Most scripts I've come across use a mysql database as background,
but if you search enough, you'll find scripts that use normal text-files as base.
You'll most likely need to reorganize you link collection, in order to make
it work "out of the box" with finished scripts.

-Geir


"Papa Legba" <Papa.Legba.666 @gmail.com> wrote in message news:39b3863a.0 503030021.1f42f 700@posting.goo gle.com...[color=blue]
> I have huge page of links, to whcih I am currently adding. I would
> like to add a "random link" button which would parse the current page,
> extract all URLs then load a random link.
>
> Before I start to code, does such s thing already exist.
>
> Thanks in advance...[/color]

[Ivo]

Re: random link form current page

"Geir Andersen" wrote[color=blue]
> "Papa Legba" wrote[color=green]
> > I have huge page of links, to whcih I am currently adding. I would
> > like to add a "random link" button which would parse the current page,
> > extract all URLs then load a random link.
> >[/color]
> Hi, such scripts already exist for the most purposes.
> Displaying random quotes, links, images, etc.
> A start is to look through the category: Randomizing, at hotscripts.com
> http://www.hotscripts.com/PHP/Script...ing/index.html
>
> Most scripts I've come across use a mysql database as background,
> but if you search enough, you'll find scripts that use normal text-files
> as base.[/color]

I don't see the need for anything serverside, especially not for databases,
when the page is already in the browser. These two lines of javascript do
the job perfectly on any page:

var a = document.links;
location.href = a[ Math.floor( a.length*Math.r andom() ) ];

If the page contains lots of '#' or 'mailto' or other strange links, you may
want to go the extra mile and filter them out:

var a = document.links, x ;
while ( !x || x.href.indexOf( 'http') !== 0 ) {
x = a[ Math.floor( a.length * Math.random() ) ];
}
location.href = x;

hth
--
Ivo

[Papa Legba]

Re: random link form current page

"Ivo" <no@thank.you > wrote in message news:<422737f3$ 0$9747[color=blue]
> I don't see the need for anything serverside, especially not for databases,
> when the page is already in the browser. These two lines of javascript do
> the job perfectly on any page:
>
> var a = document.links;
> location.href = a[ Math.floor( a.length*Math.r andom() ) ];
>
> If the page contains lots of '#' or 'mailto' or other strange links, you may
> want to go the extra mile and filter them out:
>
> var a = document.links, x ;
> while ( !x || x.href.indexOf( 'http') !== 0 ) {
> x = a[ Math.floor( a.length * Math.random() ) ];
> }
> location.href = x;[/color]

Don, that seems incredible. I have almost hacked it in PHP, but it is
much longer. Can you tell me how to refernce that from HTML (sorry, I
am not a JS person). Thanks again.

[Ivo]

Re: random link form current page

"Papa Legba" wrote[color=blue]
> Don, that seems incredible. I have almost hacked it in PHP, but it is
> much longer. Can you tell me how to refernce that from HTML (sorry, I
> am not a JS person). Thanks again.[/color]

<script type="text/javascript">
function randomlink() {
var a = document.links, x ;
while ( !x || x.href.indexOf( 'http') !== 0 ) {
x = a[ Math.floor( a.length * Math.random() ) ];
}
location.href = x;
return false;
}
</script>

<p><a href="#" onclick="return randomlink();"> Random link</a></p>

There is one caveat: on a page with nothing but "#" links the 'while' loop
will never end, freezing your browser, watch out that. For example, don't
try the above in a blank document like I did, but be sure to include some
links too :))
--
Ivo