jQuery.ga = {
  
  // properties
  
  pwac: null,

  // methods
  
  setUserPWAC: function($pwac){
    this.pwac = $pwac;
  },
  
  customisePage: function()
  {
    if(this.pwac)
    {
      var pwac = this.pwac;
      $('iframe').each(function(){
        var url = $(this).attr('src');
        url = url.replace(/&PWAC=(.*)&SCMIP/, '&PWAC=' + pwac + '&SCMIP');
        $(this).attr('src', url);
      });
    }
  }
  
}