function Is() {
  agent  = navigator.userAgent.toLowerCase();
  this.major = parseInt(navigator.appVersion);
  this.minor = parseFloat(navigator.appVersion);
  this.ns    = ((agent.indexOf('mozilla')   !=   -1) &&
               ((agent.indexOf('spoofer')   ==   -1) &&
               (agent.indexOf('compatible') ==   -1)));
  this.ns4   = (this.ns && (this.major      ==    4));
  this.ns6   = (this.ns && (this.major      >=    5));
  this.ie    = (agent.indexOf("msie")       !=   -1);
  this.ie4   = (this.ie && (this.major      ==    4) &&
               (agent.indexOf("msie 5.0")   ==   -1));
  this.ie5   = (this.ie && (this.major      ==    4) &&
               (agent.indexOf("msie 5.0")   !=   -1));
  this.ie55  = (this.ie && (this.major      ==    4) &&
               (agent.indexOf("msie 5.5")   !=   -1));
  this.ie6   = (this.ie && (this.major      ==    4) &&
               (agent.indexOf("msie 6")     !=   -1));
  this.nsdom = (this.ns4);
  this.iedom = (this.ie4 || this.ie5 || this.ie55);
  this.v4dom = (this.ie4 || this.ie5 || this.ie55 || this.ns4);
  this.w3dom = (this.ie6 || this.ns6);
}

var is = new Is();

var popup        = null;
var screenWidth  = screen.width;
var screenHeight = screen.height;
var infoLYR      = null;

function openPOPUP(url,force) {
  if(is.nsdom && !document.infoLayer || force) {
    var position_left = screenWidth-550;
    popup = window.open(url,'POPUP','resizable=Yes,scrollbars=Yes,menubar=No,status=yes,width=450,height=500,top=5,left='+position_left+'');
    popup.focus();
  }
}