/* detection du navigateur
------------------------------------------------------------------------------*/

var BrowserDetect = {
	init: function () {
		this.browser = this.searchString(this.dataBrowser) || "An unknown browser";
		this.version = this.searchVersion(navigator.userAgent) || this.searchVersion(navigator.appVersion) || "an unknown version";
		this.OS = this.searchString(this.dataOS) || "an unknown OS";
	},
	searchString: function (data) {
		for (var i=0;i<data.length;i++) {
			var dataString = data[i].string;
			var dataProp = data[i].prop;
			this.versionSearchString = data[i].versionSearch || data[i].identity;
			if (dataString) {
				if (dataString.indexOf(data[i].subString) != -1)
					return data[i].identity;
			}
			else if (dataProp)
				return data[i].identity;
			}
		},
	searchVersion: function (dataString) {
		var index = dataString.indexOf(this.versionSearchString);
		if (index == -1)
			return;
		return parseFloat(dataString.substring(index+this.versionSearchString.length+1));
	},
	dataBrowser: [
		{
			string: navigator.vendor,
			subString: "Apple",
			identity: "Safari"
		},
		{
			prop: window.opera,
			identity: "Opera"
		},
		{
			string: navigator.userAgent,
			subString: "Firefox",
			identity: "Firefox"
		},
		{
			string: navigator.userAgent,
			subString: "MSIE",
			identity: "Explorer",
			versionSearch: "MSIE"
		}
	],
	dataOS : [
		{
			string: navigator.platform,
			subString: "Win",
			identity: "Windows"
		},
		{
			string: navigator.platform,
			subString: "Mac",
			identity: "Mac"
		},
		{
			string: navigator.platform,
			subString: "Linux",
			identity: "Linux"
		}
	]
};

BrowserDetect.init();

/* variables

------------------------------------------------------------------------------*/
var browser = "js";
var addclass = "class";


/* detection du systeme d'exploitation
------------------------------------------------------------------------------*/
if(BrowserDetect.OS == "Mac")				browser += " mac";
if(BrowserDetect.OS == "Linux")			browser += " linux";
if(BrowserDetect.OS == "Windows")		browser += " win";


/* attribution des classes
------------------------------------------------------------------------------*/
if(BrowserDetect.browser == "Firefox")	browser += " firefox";
if(BrowserDetect.browser == "Opera" )	browser += " opera";
if(BrowserDetect.browser == "Safari")	browser += " safari";
if(BrowserDetect.browser == "Explorer")addclass = "className";



/* ecriture des classes
------------------------------------------------------------------------------*/
document.getElementsByTagName("HTML")[0].setAttribute(addclass, browser);