if (navigator.userAgent.toLowerCase().indexOf('iphone') > -1 || navigator.userAgent.toLowerCase().indexOf('android') > -1) {  
  if (hcomnbc_username != undefined) {
    document.location.href = 'http://www.hcomnbc.com/' + hcomnbc_username;  
  } else {
    document.location.href = 'http://www.hcomnbc.com/';  
  }
}