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 && !docGetElemId); 
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); 

this.opera = (appName.indexOf('opera') != -1 || userAgent.indexOf('opera') != -1) ? true : false; 


if (this.ie4win) { 
with (document) { 
write('<script language="VBScript" type="text/vbscript">\n'); 

write('Function flashActX(version)\n'); 
write('\tOn Error Resume Next\n'); 
write('\t\n'); 
write('\tDim FlashObj\n'); 
write('\tFlashObj = IsObject(CreateObject("ShockwaveFlash.ShockwaveFlash." & version))\n'); 
write('\tflashActX = FlashObj\n'); 
write('End Function\n'); 
write('\n\n'); 

write('Function quickTimeActX()\n'); 
write('\tOn Error Resume Next\n'); 
write('\t\n'); 
write('\tDim QuickTimeObj, QuickTime4Obj, QuickTime5Obj\n'); 
write('\tQuickTime4Obj = IsObject(CreateObject("QuickTimeCheckObject.QuickTimeCheck.1"))\n'); 
write('\tQuickTime5Obj = IsObject(CreateObject("QuickTime.QuickTime.1"))\n'); 
write('\tIf QuickTime4Obj Or QuickTime5Obj Then\n'); 
write('\t\tQuickTimeObj = true\n'); 
write('\tElse\n'); 
write('\t\tQuickTimeObj = false\n'); 
write('\tEnd If\n'); 
write('\tquickTimeActX = QuickTimeObj\n'); 
write('End Function\n'); 

write('Function realActX()\n'); 
write('\tOn Error Resume Next\n'); 
write('\t\n'); 
write('\tDim RealObj, Real4Obj, Real5Obj, RealG2Obj\n'); 
write('\tReal4Obj = IsObject(CreateObject("RealVideo.RealVideo(tm) ActiveX Control (32-bit)"))\n'); 
write('\tReal5Obj = IsObject(CreateObject("RealPlayer.RealPlayer(tm) ActiveX Control (32-bit)"))\n'); 
write('\tRealG2Obj = IsObject(CreateObject("rmocx.RealPlayer G2 Control"))\n'); 
write('\tIf Real4Obj Or Real5Obj Or RealG2Obj Then\n'); 
write('\t\tRealObj = true\n'); 
write('\tElse\n'); 
write('\t\tRealObj = false\n'); 
write('\tEnd If\n'); 
write('\trealActX = RealObj\n'); 
write('End Function\n'); 
write('\n\n'); 

write('Function winMediaActX()\n'); 
write('\tOn Error Resume Next\n'); 
write('\t\n'); 
write('\tDim WinMediaObj\n'); 
write('\tWinMediaObj = IsObject(CreateObject("MediaPlayer.MediaPlayer.1"))\n'); 
write('\twinMediaActX = WinMediaObj\n'); 
write('End Function\n'); 

write('</script>\n'); 
} 

this.flash4Enabled = (typeof(flashActX(4)) == 'undefined') ? false : flashActX(4); 
this.flash5Enabled = (typeof(flashActX(5)) == 'undefined') ? false : flashActX(5); 
this.quickTimeEnabled = (typeof(quickTimeActX()) == 'undefined') ? false : quickTimeActX(); 
this.realEnabled = (typeof(realActX()) == 'undefined') ? false : realActX(); 
this.winMediaEnabled = (typeof(winMediaActX()) == 'undefined') ? false : winMediaActX(); 
} else { 
if (navigator.plugins && navigator.plugins['Shockwave Flash']) { 
var str = navigator.plugins['Shockwave Flash'].description.split(' '); 
var flashPlugIn = 0; 
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; 
} else { 
this.flash4Enabled = false; 
this.flash5Enabled = false; 
} 

if (navigator.plugins) { 
var quickTimePlugIn = false; 
var realPlugIn = false; 
var winMediaPlugIn = false; 

for (var i = 0; i < navigator.plugins.length; i++) { 
if (navigator.plugins[i].name.indexOf('QuickTime') != -1) { 
quickTimePlugIn = true; 
} else if (navigator.plugins[i].name.indexOf('RealPlayer') != -1) { 
realPlugIn = true; 
} else if (navigator.plugins[i].name.indexOf('Windows Media') != -1) { 
winMediaPlugIn = true; 
} 
} 

this.quickTimeEnabled = quickTimePlugIn; 
this.realEnabled = realPlugIn; 
this.winMediaEnabled = winMediaPlugIn; 
} else { 
this.quickTimeEnabled = false; 
this.realEnabled = false; 
this.winMediaEnabled = false; 
} 
} 

this.javaEnabled = navigator.javaEnabled(); 
} 

var is = new browserCheck();