// JavaScript Document<script type="text/javascript">
        function mostra_nascondi_div(div_id)
        {
            var arr_divz = new Array('contact_Milano', 'contact_Torino1', 'contact_Asti', 'contact_Torino2', 'contact_Alessandria', 'contact_Torino3');

            var divz = document.getElementById(div_id);   
            if (divz) {                
                var conto_divz = arr_divz.length;
                
                for (k = 0; k < conto_divz; ++k) {
                    if (div_id == arr_divz[k] || document.getElementById(arr_divz[k]).style.display == '') {
                        document.getElementById(arr_divz[k]).style.display = 'block';
                    } else {
                        document.getElementById(arr_divz[k]).style.display = 'none';
                    }
                }
            }
        }