How to identifying images space? [RGB/CMYK]

Hi,

Could you please any one help me, how to identify image space [RGB /CMYK] of links in InDesign CS5.5.

Is it possible? or We need to use bridge only?

I tried b/m code, but i got "Error: A value is not available for this type of image" message

var myLinks = app.activeDocument.links;

try{

for ( i = 0; i < myLinks.length; i++ )  {

    var link = myLinks[i];

    if (link.status == LinkStatus.NORMAL) {

        var image = link.parent;

        alert(image.space);

        }

    }

}

catch(e){

alert(e);

}

--

Thanks in advance,

Bala