如何得到当前浏览器是什么

1、先看结果

写一段javascript代码，在chrome中执行

在firefox中执行 这样能得到浏览器名称

2、 show me the code

    
    
      var x = document.getElementById('browser');
      x.innerHTML = getBrowser();

function getBrowser(){
	var nVer = navigator.appVersion;
	var nAgt = navigator.userAgent;
	var browserName  = navigator.appName;
	var fullVersion  = ''+parseFloat(navigator.appVersion);
	var majorVersion = parseInt(navigator.appVersion,10);
	var nameOffset,verOffset,ix;

	// In Opera, the true version is after "Opera" or after "Version"
	if ((verOffset=nAgt.indexOf("Opera"))!=-1) {
	 browserName = "Opera";
	 fullVersion = nAgt.substring(verOffset+6);
	 if ((verOffset=nAgt.indexOf("Version"))!=-1)
	   fullVersion = nAgt.substring(verOffset+8);
	}
	// In MSIE, the true version is after "MSIE" in userAgent
	else if ((verOffset=nAgt.indexOf("MSIE"))!=-1) {
	 browserName = "Microsoft Internet Explorer";
	 fullVersion = nAgt.substring(verOffset+5);
	}
	// In Chrome, the true version is after "Chrome"
	else if ((verOffset=nAgt.indexOf("Chrome"))!=-1) {
	 browserName = "Chrome";
	 fullVersion = nAgt.substring(verOffset+7);
	}
	// In Safari, the true version is after "Safari" or after "Version"
	else if ((verOffset=nAgt.indexOf("Safari"))!=-1) {
	 browserName = "Safari";
	 fullVersion = nAgt.substring(verOffset+7);
	 if ((verOffset=nAgt.indexOf("Version"))!=-1)
	   fullVersion = nAgt.substring(verOffset+8);
	}
	// In Firefox, the true version is after "Firefox"
	else if ((verOffset=nAgt.indexOf("Firefox"))!=-1) {
	 browserName = "Firefox";
	 fullVersion = nAgt.substring(verOffset+8);
	}
	// In most other browsers, "name/version" is at the end of userAgent
	else if ( (nameOffset=nAgt.lastIndexOf(' ')+1)