// JavaScript Document

     function newwindow(sidfile) 

     { 

     window.open('http://www.nls.uk:8080/StyleServer/calcrgn?cat=OneInchPopularEnglandWales&item=/'+sidfile+'.sid&style=maps.xsl&wid=700&hei=500&browser=win_ie&plugin=false','jav','width=800,height=600,resizable=yes'); 

     }