function openWin(l,h,url) {
var width_sc  = Math.floor((screen.width-l)/2);
var height_sc = Math.floor((screen.height-h)/2);
window.open(url, "page", "toolbar=0,location=0,directories=0,status=0,scrollbars=0,resizable=0,menubar=0,top="+height_sc+",left="+width_sc+",width="+l+",height="+h);
}