var si = ( screen.availWidth / 6.8 )                                            
sw = Math.round(si)                                                             
                                                                                
var sw2 = (sw * 2)                                                              
var sw3 = (sw * 3)                                                              
var sw4 = (sw * 4)                                                              
var sw5 = (sw * 5)                                                              
var sw6 = (sw * 6)