var TechInfo_Win;
function open_tech_info()
{
	var winurl = "pages/techinfo.html";
	var winname = "TechInfoWindow";

	var winprops = "scrollbars=no,menubars=no,resizable=yes,toolbars=no,width=50,height=50";

	TechInfo_Win = window.open(winurl, winname, winprops);

	if ( TechInfo_Win != null ) {
		TechInfo_Win.opener = self;
		TechInfo_Win.focus();
	}
}