/* global variables for browser detection */
var is_ns = false /* netscape 4.x */
if(parseInt(navigator.appVersion)>=4){
	if (navigator.appName == "Netscape"){
		is_ns = true
	}
}
var is_ie = false /* MS Internet Explorer 4.x+ */
if(navigator.userAgent.indexOf('MSIE 4') != -1){
	is_ie = true
}
var is_ie5 = false /* MS Internet Explorer 5.x+ */
if (navigator.userAgent.indexOf('MSIE 5') != -1){
	is_ie5 = true
}
var is_mac = false /* is the client OS Mac oS? */
if ((navigator.userAgent.indexOf('Mac') != -1) || (navigator.userAgent.indexOf('mac') != -1)){
	is_mac = true
}