// BEGINNING BRROWSER SNIFF-------------------------------------------------------------------------->

var agt=navigator.userAgent.toLowerCase();
    var is_major = parseInt(navigator.appVersion);
    var is_minor = parseFloat(navigator.appVersion);
    var is_nav  = ((agt.indexOf('mozilla')!=-1) && (agt.indexOf('spoofer')==-1)
                && (agt.indexOf('compatible') == -1) && (agt.indexOf('opera')==-1)
                && (agt.indexOf('webtv')==-1));
   
    var is_nav4 = (is_nav && (is_major == 4));
    var is_nav4up = (is_nav && (is_major >= 4) && (is_minor>4.05));
    var is_ie   = (agt.indexOf("msie") != -1);
    var is_ie4up  = (is_ie  && (is_major >= 4));
    var is_mac    = (agt.indexOf("mac")!=-1);