function openwindow(ls,pic,ttl,w,h)
{

    var w1 = screen.availWidth;
    var h1 = screen.availHeight;
    
    var leftpos;
var toppos;
    
    if(typeof(w1)!='undefined')
    {

 leftpos = (w1-w)/2;
 toppos = (h1-h)/2;
}
else
	{
	leftpos = 0;
	toppos = 0;
	}

	win = window.open(ls + "/picture.php?title=" + ttl + "&picture=" + pic,"_blank", 'width=' + (w) + ',height=' + (h)+ ',top=' + toppos + ',left=' + leftpos  );
	if (navigator.appName=='Netscape') { win.focus(); }
	
}