var formSwitcher = {
    hiddenFields : [ 'dslProvider', 'phoneNumber', 'fieldPhoneProvider', 'phoneConnect' ]

   ,provider : {
        'T_COM' : [ 'dslProvider', 'phoneNumber' ]
       ,'ARCOR' : [ 'phoneNumber' ]
       ,'ALICE' : [ 'phoneNumber' ]
       ,'NETCOLOGNE' : [ 'phoneNumber' ]
       ,'M_NET' : [ 'phoneNumber' ]
       ,'VERSATEL' : [ 'phoneNumber' ]
       ,'OTHER' : [ 'phoneNumber' ]
       ,'NONE' : [ 'fieldPhoneProvider' ]
       ,'1und1' : [ 'fieldPhoneProvider' ]
    }

   ,switchStyleDisplay : function( field, element )
    {
        if ( field.checked == true ) {
            element.style.display = '';
        } else {
            element.style.display = 'none';
        }
    }

   ,divergentAddress : function()
    {
        this.switchStyleDisplay( document.getElementById('add-address')
                               , document.getElementById('divergentAddress') );
    }

   ,additionalPhoneNumbers : function()
    {
        this.switchStyleDisplay( document.getElementById('tae-phoneNumberAdd-true')
                               , document.getElementById('portPhoneNumer') );
    }

   ,alreadyExistPhoneSocket : function()
    {
        this.switchStyleDisplay( document.getElementById('tae-location')
                               , document.getElementById('phoneConnect') );
    }

   ,callpackPhoneSMS : function()
    {
        var callback = document.getElementById('callbackPhone-sms');

        if ( callback.checked ) {
            document.getElementById('bodyCallbackPhone').style.display  = 'none';
            document.getElementById('bodyCallbackMobile').style.display = '';
        } else {
            document.getElementById('bodyCallbackPhone').style.display  = '';
            document.getElementById('bodyCallbackMobile').style.display = 'none';
        }
    }

   ,previousProvider : function( selectBox )
    {
        for( var i=0; i<this.hiddenFields.length; i++ ) {
            document.getElementById(this.hiddenFields[i]).style.display = 'none';
        }

        if ( selectBox.value.length > 0 && this.provider[selectBox.value] ) {
            for( var i=0; i<this.provider[selectBox.value].length; i++ ) {
                document.getElementById(this.provider[selectBox.value][i]).style.display = '';

                if ( this.provider[selectBox.value][i] == 'fieldPhoneProvider' ) {
                    document.getElementById('tae-location').checked = false;
                }
            }
        }
    }
};