var w = screen.availWidth;
var h = screen.availHeight;
var popWidth = 550;
var popHeight = 255;
var leftPos = (w-popWidth)/2;
var topPos= (h-popHeight)/2;

function optinbuddy(cgi){
   var screen='\'scrollbars=yes,width='+popWidth+',height='+popHeight+',top='+topPos+',left='+leftPos+'\'';	
   var url='http://www.smallgreentree.net/cgi-bin/optincgi/'+cgi+'.cgi';
   window.open(url,'_blank',screen);
	return;
}