function pop(str) {
   var w = 512;
   var h = 384;
   var l = Math.floor((screen.width-w)/2);
   var t = Math.floor((screen.height-h)/2);
   window.open(str,"","width=" + w + ",height=" + h + ",top=" + t + ",left=" + l);
 }

function pop1(str) {
   var w = 206;
   var h = 410;
   var l = Math.floor((screen.width-w)/2);
   var t = Math.floor((screen.height-h)/2);
   window.open(str,"","width=" + w + ",height=" + h + ",top=" + t + ",left=" + l);
 }

function pop2(str) {
   var w = 534;
   var h = 311;
   var l = Math.floor((screen.width-w)/2);
   var t = Math.floor((screen.height-h)/2);
   window.open(str,"","width=" + w + ",height=" + h + ",top=" + t + ",left=" + l);
 }

function pop3(str) {
   var w = 305;
   var h = 115;
   var l = Math.floor((screen.width-w)/2);
   var t = Math.floor(((screen.height-h)/2)-20);
   window.open(str,"","width=" + w + ",height=" + h + ",top=" + t + ",left=" + l);
 }

function pop4(str) {
   var w = 415;
   var h = 150;
   var l = Math.floor((screen.width-w)/2);
   var t = Math.floor(((screen.height-h)/2)-20);
   window.open(str,"","width=" + w + ",height=" + h + ",top=" + t + ",left=" + l);
 }