[jQuery] Why won't this get the image's width?

[Bruce MacKay]

Hello folks,

This piece of code
        if (($('#theImage').length>0)) {
            var img_width = $('#theImage').width();
                 $.log(img_width);
            $("#sCaption").css("width",img_width);
        };

follows an ajax call to bring content to an existing div...

    $.get("scripts/ajax_ramosus_client_second.asp?brm="+ej +"&q="  + 
new Date().getTime(), function(responseText){
        $("#wrapper").html(responseText);

I don't understand why the width is always being reported as 0.

The relevant portion of the HTML being returned is...

<img src="images/ramosus/dicentra/dicentra1.jpg" id="theImage" 
class="pad5" alt=""><div id="sCaption" style="width: 0pt;"><br>Lorem 
ipsum dolor sit amet, consectetuer adipiscing elit. Duis in ipsum. 
Donec faucibus sodales lacus?</div>


Any ideas?

Is it, perhaps, that if the image hasn't loaded before the code is 
processed, then the width of theImage will be 0.  If so, how do I 
code around this issue?

Thanks,
Bruce