ns4 = (document.layers)? true:false
ie4 = (document.all)? true:false

function showObject(obj) {
       if (ns4) obj.visibility = "show"
       else if (ie4) obj.visibility = "visible"
}

function hideObject(obj) {
       if (ns4) obj.visibility = "hide"
       else if (ie4) obj.visibility = "hidden"
}	

function init(){
	if (ns4) {
	privati = document.privatiDiv
	imprese = document.impreseDiv
	professionisti = document.professionistiDiv
			}
			
	if (ie4) {
	privati = privatiDiv.style
	imprese = impreseDiv.style
	professionisti = professionistiDiv.style
			}
	hideObject(privati)
	hideObject(imprese)
	hideObject(professionisti)
}