add image src from javascript function

[ktsirig]

Hello,
I have a js function inside the head of a page of mine which takes 2 arguments that are created dynamically based on what I retrieve from a database.
My question is whether I can set the attribute src of the <img> tag through the js function. What I have is:

 <script type="text/javascript">
function HideShow(myVar, mySecondVar) 
     { 
        if (document.getElementById(myVar).style.display == 'none') 
        { 
          document.getElementById(myVar).style.display = 'inline'
          -----> mySecondVar.src = "css/images/show.gif"
        } 
        else 
        { 
          document.getElementById(myVar).style.display = 'none'
         -----> mySecondVar.src = "css/images/hide.gif" 
          }
     } 
</script> 

The lines with the arrow in front of them do not work, presumably there is a mistake in the syntax because I see no image...

I would greatly appreciate any help!

[MarkFilipak]

> can set the attribute src of the <img> tag through the js function
Yes, and it will cause the image to be immediately fetched!

> lines with the arrow in front of them do not work
try mySecondVar.setAttribute('src', 'css/images/show.gif');