[Javascript] dynamic variables names

[Peter Brunone]

Marcelo,

   I'm not sure if this will completely answer your question, but you can create Javascript code from a string using the eval() function... so if you want to refer to an image called 'myGif', you can set a variable equal to eval('myGif') and then call that variable's .src property.  Of course, you can also use the available collections and getElementByID as Chris has shown below.

Regards,

Peter

---------- Original Message ----------------------------------
From: "Marcelo Simon" <grillo at lazzuri.com.br>
Reply-To: "[JavaScript List]" <javascript at LaTech.edu>
Date:  Tue, 24 Jun 2003 14:44:25 -0300

>Thanks for the answers, but they didn't solve my problem.
>
>I didn't post the entire function, and that's why I think you say that I don't have a dynamic variable name. ( or maybe I'm wrong ), here's the function
>
>function note(number){
> for ( var i=1; i < 6; i++){
>  if ( i <= number ){
>  alert(['nt_0'+i].src); // it's tracing undefined
>   ['nt_o'+i].src = '../_img/1_note_0'+i+'_on.gif';
>  } else {
>   ['nt_o'+i].src = '../_img/1_note_0'+i+'_off.gif';
>  }
> }
>}
>
>what I'm trying to accomplish, is to change some images from 1 to i based on the number I pass to the function (ie. if I pass 3, I want images 1,2 and 3 to be on and 4 and 5 to be off ), so if someone has a different approach to this please share.
>
>Thanks again
>Marcelo Simon
>
>  ----- Original Message ----- 
>  From: Chris Tifer 
>  To: [JavaScript List] 
>  Sent: Tuesday, June 24, 2003 1:10 PM
>  Subject: Re: [Javascript] dynamic variables names
>
>
>  Do you have a dynamic variable name? I would never use a 
>  dynamic variable to be honest with you - or at least haven't ever 
>  found the need for one yet, but from the looks of it below, you 
>  don't have a dynamic variable, but rather you're trying to build 
>  a reference to an image dynamically.
>
>  To do that, use the document.images collection and 
>  build your string when targeting a specific element in that 
>  collection:
>
>  document.images["nt_o" + i].src = "path/to/image.gif"
>
>  That's not a dynamic variable name - just so you're aware.
>
>  Chris Tifer
>  http://emailajoke.com
>
>    ----- Original Message ----- 
>    From: Marcelo Simon 
>    To: * Yahoo / Javascript 
>    Sent: Tuesday, June 24, 2003 11:50 AM
>    Subject: [Javascript] dynamic variables names
>
>
>    Hi list, 
>
>    It's me again, and I need some help again please.
>
>    how can I use dynamic variables name in JS ?
>
>    I mean, how do I evaluate the 2 parts so they work ?
>
>    if ( i <= number ){
>       ['nt_o'+i].src = '../_img/1_nota_0'+i+'_on.gif';
>    }
>
>    thanks in advance