function browserCheck() {
    var userAgent = navigator.userAgent.toLowerCase();
    var appName = navigator.appName.toLowerCase();
    
    var docAll = (document.all) ? true : false;
    var docLayers = (document.layers) ? true : false;
    var docGetElemId = (document.getElementById) ? true : false;
    
    this.win = (userAgent.indexOf('win') != -1) ? true : false;
    this.mac = (userAgent.indexOf('mac') != -1) ? true : false;
    this.linux = (userAgent.indexOf('linux') != -1 || userAgent.indexOf('x11') != -1) ? true : false;
    
    this.ie = (appName.indexOf('internet explorer') != -1) ? true : false;
    this.ie4 = (this.ie && docAll);
    this.ie4win = (this.ie4 && this.win);
    this.ie4mac = (this.ie4 && this.mac && !docGetElemId);
    this.ie5 = (this.ie4 && docGetElemId);
    this.ie5mac = (this.ie5 && this.mac);
    
    this.ns = (appName.indexOf('netscape') != -1) ? true : false;
    this.ns4 = (this.ns && docLayers);
    this.ns6 = (this.ns && docGetElemId);
    
    if (this.ie4win) {
        with (document) {
            write('<scr'+'ipt language="VBScript" type="text/vbscript">\n');
            write('Function flashActX(flashVer)\n');
            write('\tOn Error Resume Next\n');
            write('\t\n');
            write('\tDim FlashObj\n');
            write('\tFlashObj = IsObject(CreateObject("ShockwaveFlash.ShockwaveFlash." & flashVer))\n');
            write('\tflashActX = FlashObj\n');
            write('End Function\n');
            write('</script>\n');
        }
        this.flash4Enabled = (typeof(flashActX(4)) != 'undefined') ? true : false;
        this.flash5Enabled = (typeof(flashActX(5)) != 'undefined') ? true : false;
        this.flash6Enabled = (typeof(flashActX(6)) != 'undefined') ? true : false;
    } else {
        if (navigator.plugins && navigator.plugins['Shockwave Flash']) {
            var flashPlugIn = 0;
            var str = navigator.plugins['Shockwave Flash'].description.split(' ');
            for (var i = 0; i < str.length; i++) {
                if (!isNaN(parseInt(str[i]))) {
                    flashPlugIn = parseInt(str[i]);
                    break;
                }
            }
            this.flash4Enabled = (flashPlugIn >= 4) ? true : false;
            this.flash5Enabled = (flashPlugIn >= 5) ? true : false;
            this.flash6Enabled = (flashPlugIn >= 6) ? true : false;
		    } else {
            this.flash4Enabled = false;
            this.flash5Enabled = false;
            this.flash6Enabled = false;
		
        }
    }
    
    this.javaEnabled = navigator.javaEnabled();
}
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