function popNav() {

   var url = "http://www.coastalelectric.coop/billpayoffline.htm"; // nav url
   var winW = 200; // window width
   var winH = 400;   // window height

   var winX = screen.availWidth - winW;
   var navWin = window.open(url,'navWin','width='+winW+',height='+winH+',top=0,left='+winX+'');
   navWin.focus();

}