<!--
//var ns = (document.layers) ? 1:0; // netscape 4x
//var ie = (document.all) ? 1:0; // explorer 4x
//var ni = (document.getElementById) ? 1:0; // netscape 6, explorer 5, mozilla
//var browser=((ns || ie || ni) && parseInt(navigator.appVersion)>=4)
//------------------------------------------------------------------------
//Check del browser e setup delle variabili necessarie per il crossbrowser 
	var layerRef, styleRef, showRef, hideRef	
	var ns, ie, ni
	var navName=navigator.appName
	var navVer=navigator.appVersion
	if (navName == "Netscape" && parseInt(navVer)==4) {
		ns = true
		layerRef = ".layers['"
		styleRef = "']"
		showRef = "show"
		hideRef = "hide"
	}
	if (navName.indexOf("Explorer",0) != -1 && parseInt(navVer)==4) {
		ie = true
		layerRef = ".all['"
		styleRef = "'].style"
		showRef = "visible"
		hideRef = "hidden"
	}
	if (document.getElementById) {
		ni = true
		layerRef = ".getElementById('"
		styleRef = "').style"
		showRef = "visible"
		hideRef = "hidden"
	}
//------------------------------------------------------------------------------------------------
//-->