Javascript 判断客户端浏览器类型代码

<script type="text/javascript"> 
/*详细方法1*/ 
function CheckBrowser() 
{ 
var app=navigator.appName; 
var verStr=navigator.appVersion; 
//火狐浏览器 
if (app.indexOf('Netscape') != -1) 
{ 
alert("你使用的是Netscape浏览器或火狐浏览器。"); 
} 
else if (app.indexOf('Microsoft') != -1) 
{ 
if (verStr.indexOf("MSIE 3.0")!=-1 || verStr.indexOf("MSIE 4.0") != -1 || verStr.indexOf("MSIE 5.0") != -1 || verStr.indexOf("MSIE 5.1") != -1) 
{ 
alert("您使用的是低版本(IE6.0以下)的浏览器."); 
} 
else 
{ 
alert("您使用的是IE6.0以上的浏览器."); 
} 
} 
} 
/*简洁方法2*/ 
function CheckBrowser1() 
{ 
if (window.navigator.userAgent.indexOf("MSIE")>=1) 
//如果浏览器为IE 
{ 
alert("IE浏览器"); 
} 
else //如果浏览器为Firefox 
{ 
if (window.navigator.userAgent.indexOf("Firefox")>=1) 
{ 
alert("Fixfox浏览器"); 
} 
} 
} 
//调用 
CheckBrowser(); 
CheckBrowser1(); 
</script>

JavaScript 获取 客户端信息

document.write("Screen resolution: ") 
document.write(screen.width + "*" + screen.height) 
document.write("<br />") 
document.write("Available view area: ") 
document.write(screen.availWidth + "*" + screen.availHeight) 
document.write("<br />") 
document.write("Color depth: ") 
document.write(screen.colorDepth) 
document.write("<br />") 
document.write("Buffer depth: ") 
document.write(screen.bufferDepth) 
document.write("<br />") 
document.write("DeviceXDPI: ") 
document.write(screen.deviceXDPI) 
document.write("<br />") 
document.write("DeviceYDPI: ") 
document.write(screen.deviceYDPI) 
document.write("<br />") 
document.write("LogicalXDPI: ") 
document.write(screen.logicalXDPI) 
document.write("<br />") 
document.write("LogicalYDPI: ") 
document.write(screen.logicalYDPI) 
document.write("<br />") 
document.write("FontSmoothingEnabled: ") 
document.write(screen.fontSmoothingEnabled) 
document.write("<br />") 
document.write("PixelDepth: ") 
document.write(screen.pixelDepth) 
document.write("<br />") 
document.write("UpdateInterval: ") 
document.write(screen.updateInterval) 
document.write("<br />")