var agt=navigator.userAgent.toLowerCase();


    var is_major = parseInt(navigator.appVersion);
    var is_minor = parseFloat(navigator.appVersion);

    var is_nav  = ((agt.indexOf('mozilla')!=-1));
    var is_nav2 = (is_nav && (is_major == 2));
    var is_nav3 = (is_nav && (is_major == 3));
  var is_nav4 = (is_nav && (is_major == 4));  
    var is_nav4up = (is_nav && (is_major >= 4));
    var is_nav5 = (is_nav && (is_major == 5));
    var is_nav5up = (is_nav && (is_major >= 5));
	/**/
    var is_ie   = (agt.indexOf("msie") != -1);
    var is_ie3  = (is_ie && (is_major < 4));
    var is_ie4  = (is_ie && (is_major == 4) && (agt.indexOf("msie 5.0")==-1) );
    var is_ie4up  = (is_ie  && (is_major >= 4));
    var is_ie5  = (is_ie && (is_major == 4) && (agt.indexOf("msie 5.0")!=-1) );
    var is_ie5up  = (is_ie  && !is_ie3 && !is_ie4);
	/**/
    var is_aol   = (agt.indexOf("aol") != -1);
    var is_aol3  = (is_aol && is_ie3);
    var is_aol4  = (is_aol && is_ie4);
    var is_opera = (agt.indexOf("opera") != -1);
    var is_webtv = (agt.indexOf("webtv") != -1);
	/**/
    var is_win   = ( (agt.indexOf("win")!=-1));
    var is_mac    = (agt.indexOf("mac")!=-1);
	/**/
	var isMenu = ((is_ie4up && !is_mac) || (is_nav4up && is_minor>4.05));
    NS4 = (document.layers);
    IE4 = (document.all);
    ver4 = (NS4 || IE4);   
    isMac = (navigator.appVersion.indexOf("Mac") != -1);
    
    function popUp(){return};
    function popDown(){return};
    function startIt(){return}
    if (!ver4) event = null;