[thelist] Javascript and window size

[Stephen Rider]

I have some pages where the User clicks on a thumbnail and a popup  
appears with a larger image in it.

I try to specify the size of the popup as the dimensions of the image  
plus (for example) 30 pixels.  My problem is that Internet Explorer,  
Firefox, and Opera all seem to interpret these numbers differently,  
especially with height.

IE is much shorter than the others.  I think it's including its own  
toolbar and such in the height.  Opera is just a bit shorter than Opera.

Does anyone have a good way of dealing with the differing  
interpretations of height in different browsers?  I hate the thought  
of resorting to browser sniffing, but I can't think of how else to  
approach this!

Any help is appreciated.

Thanks,
Stephen Rider