// Derived from ultimate client-side JavaScript client sniff.
// (C) Netscape Communications 1999.  Permission granted to reuse.
    var agt=navigator.userAgent.toLowerCase();

    var is_major = parseInt(navigator.appVersion);
    var is_minor = parseFloat(navigator.appVersion);
    
    var is_ie     = (agt.indexOf("msie") != -1);
    var is_ie5    = (is_ie && (is_major == 4) && (agt.indexOf("msie 5.0")!=-1) );
    var is_ie5_5  = (is_ie && (is_major == 4) && (agt.indexOf("msie 5.5") !=-1));
	var is_ie6  = (is_ie && (is_major == 4) && (agt.indexOf("msie 6.0") !=-1));