var Ver4 = parseInt(navigator.appVersion) >= 4
var Nav4 = ((navigator.appName == "Netscape") && Ver4)
var IE4 = ((navigator.userAgent.indexOf("MSIE") != -1) && Ver4)
function Numeri()
{
	if ((!Nav4)&& ((event.keyCode < 48) || (event.keyCode > 57))) event.returnValue = false
}