javascript variables

[PRSBOY]

hey, how can i get the variable from my javascript inclusion into my .js file?

this is the includsion from my php file

&lt;script type="text/javascript" src="./jscripts/script.js?url=http://google.com"></script>

and this is where i want to use it in the .js

http.open('getb]url[/b]+'files/parse/ajax.php?action='+action

how can i do it? im guessing i need to set the variable somewhere, but im not sure how.

[Kudos Veteran]

You can't pass variables to javascript using the url. Open script tags above it and stick the variable in there.

[Echilon]

You could use a server side language to grab the GET variable and write it into a script tag, then use in JavaScript.

[jtchange]

if you are trying to grab the url from the script tag, you could make it the first script tag on your page and do something like this:

		<script src="myscript.js?url=http://lol.com" charset="utf-8"></script>
		<script charset="utf-8">
			var script = document.getElementsByTagName('script')[0];
			var url = script.src.substring(script.src.indexOf("?url=")+5script.sscript.src.length);
			alert(url);
		</script>

That should grab it...or you could set your script to have an ID and get it that way. In that case, you would just give your script tag an ID and then grab it with

var script = document.getElementById('theid');

Hope that helped a bit.

[Antaris Veteran]

Or, you could simply have a page such like:

&lt;script type="text/javascript" src="/mypage.aspx?var1=a&var2=b"></script>

You could then get 'mypage.aspx' (or whatever scripting language you use) to write the javascript with a content type of text/javascript.

[Marcel T]

I'd recommend keeping the JS client-side, just declaring the vars before linking to an external js file.

<script type="text/javascript">
var msg = 'It worked';
</script>
<script type="text/javascript" src="a.js"></script>

Then just reference the var as if it had been declared in the external JS file.

[PRSBOY]

yea, i've gone with the declaring it before the file is included, works alright. i was just pretty sure you could get the variable that way, i just wanted to see.

thanks for your replies.

[Kudos Veteran]

To those of you suggesting server-side solutions, have fun with the cache!

[PRSBOY]

  Kudos said:

To those of you suggesting server-side solutions, have fun with the cache!

thats one of the reasons i didnt want to do it server side :)

[Antaris Veteran]

  Kudos said:

To those of you suggesting server-side solutions, have fun with the cache!

Hmm...

ASP.NET:

Response.Cache.SetCacheability(HttpCacheability.NoCache)

ASP:

Response.CacheControl = "no-cache"
Response.AddHeader "Pragma", "no-cache"
Response.Expires = -1

PHP:

header("Cache-Control: no-cache, must-revalidate");
header("Pragma: no-cache");

[Kudos Veteran]

  Antaris said:

Hmm...

ASP.NET:

Response.Cache.SetCacheability(HttpCacheability.NoCache)

ASP:

Response.CacheControl = "no-cache"
Response.AddHeader "Pragma", "no-cache"
Response.Expires = -1

PHP:

header("Cache-Control: no-cache, must-revalidate");
header("Pragma: no-cache");

I'm not disputing it's viability. It introduces more complexity that will in the end just make things more difficult than it needs be. As a rule, I avoid messing with the cache unless there is no alternative. In this particular case it is not only bad practice, but completely needless.

Edited July 5, 2007 by Kudos

[The_Decryptor Veteran]

Could do the harder server side messages, or could go crazy and just embed the variables in the page like kudos and saachi said.

Of course if you want to do more work, go the serverside way.