function Is()
 {
  var agent = navigator.userAgent.toLowerCase();
  this.major = parseInt(navigator.appVersion);
  this.ns  = ((agent.indexOf('mozilla')!=-1) && ((agent.indexOf('spoofer')==-1) && (agent.indexOf('compatible') == -1)));
  this.ns4 = (this.ns && (this.major >= 4) && (this.major < 5));
  this.ns6 = (this.ns && (this.major >= 5));
  this.ie   = (agent.indexOf("msie") != -1);
  this.ie4  = (this.ie && (this.major >= 4));
 }

  //////////////////////////
 // The global variables //
//////////////////////////
var is = new Is();

function OpenPopup(htmname, winname, xs, ys, plus)
 {
  if(is.ns4) { FirstWin = window.open(htmname, winname, "width="+xs+",height="+ys+",screenX=1,screenY=1,status=0,resizeable=0"+plus)}
  else { FirstWin = window.open(htmname, winname, "width="+xs+",height="+ys+",status=0,resizeable=0"+plus) }
 }