I use links like this to open enlarged images in a new window, it works very well:
openWin('_enlarge.asp?file=' + document['currentimg'].src);
It basically works, except I cannot find the correct syntax to insert the 800 and 600. I tried this but it does not work:
openWin('_enlarge.asp?file=' + document['currentimg'].src + '800,600');
I guess its just a syntax problem, I don't know how to specify those parameters with the single quotes.