function popup(url,w,h) {
  	var sh = ((screen.height-h)/2);
	var sw = ((screen.width-w)/2);
        win=window.open(url, "",
                   "location=no,scrollbars=no,menubars=no,toolbar=no,resizable=no,top="+sh+",left="+sw+",height="+h+",width="+w);
}     
function popup_sc(url,w,h) {
  	var sh = ((screen.height-h)/2);
	var sw = ((screen.width-w)/2);
        win=window.open(url, "",
                   "location=no,scrollbars=yes,menubars=no,toolbar=no,resizable=no,top="+sh+",left="+sw+",height="+h+",width="+w);
}