var ns4 = (document.layers) ? true : false;  // browser sniffer
var ie4 = (document.all) ? true : false;
var ns6 = (document.getElementById&&!document.all) ? true : false;


function popw(loc,nam,wid,hei,othe) {
if (window.screen)
{
x = (screen.availWidth - wid) * 0.5;
y = (screen.availHeight- hei) * 0.5;
}
else
{
x = 50;
y = 50;
}
if (othe=='') {popupw=window.open(loc,nam,'width='+wid+',height='+hei)
 } else {popupw=window.open(loc,nam,'width='+wid+',height='+hei+','+othe)
}
popupw.moveTo(x,y);
l=popupw.focus();
}

function popopprint(l) {
popw(l,'print_window',550,420,'scrollbars=yes,status=yes')
}