Re: [Javascript] dynamic variables names

[grillo at lazzuri.com.br]

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Ok, I understood now what you'd say. 
Sorry, but my knowledge of javascript is based in actionscript, it's the same reference language but not the same, I know.

I have tried using alert(document.images); and it did trace to [object] which is correct, but when I try to do alert(document.images[nt_01]) or alert(document.images[nt_01].src) all I get is an undefined and I don't know why.

this is the code for my image

 <td><a href="#"><img src="../_img/1_nota_01_off.gif" name="nt_01" width="16" height="26" border="0" onMouseOver="note(1);" onMouseOut="out()"></a></td>

( i had typed wrong in the first email saying nt_o1, but it was only in the email )

thanks for explaining me

Marcelo Simon
  ----- Original Message ----- 
  From: Chris Tifer 
  To: [JavaScript List] 
  Sent: Tuesday, June 24, 2003 3:25 PM
  Subject: Re: [Javascript] dynamic variables names


  I fully understood what you're doing. I didn't need to see 
  the rest. You're trying to dynamically set an image's source.

  I'm sure you have them named:

  nt_o1, nt_o2, nt_o3, etc...

  What I was saying is that you're referencing them incorrectly 
  which is why you think you need a dynamic variable.  If you were 
  to reference the element through the .image collection, you'd 
  be able to access them by name or index. 

  Since you're looking to reference them by name (the correct 
  choice in my book), you are forming a value, not a variable.  
  Your value is the string "nt_o" + the dynamic value of i

  So my real suggestion out of that was to reference the image 
  through the collection rather than trying to reference it by 
  ID.

  Chris Tifer
  http://emailajoke.com

    ----- Original Message ----- 
    From: Marcelo Simon 
    To: [JavaScript List] 
    Sent: Tuesday, June 24, 2003 1:44 PM
    Subject: Re: [Javascript] dynamic variables names


    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


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