var BRE = {

    /**
     * Init UI functions
     */         
    init: function () {
         if (dollar.browser.msie) {
            BRE.emulateHover(dollar("#nav li"));
            }
             
         BRE.navigationOpacity();
         BRE.preloadImages([]);
    },
    
    /**
     * Emulate hover in IE6
     */          
    emulateHover: function (items) {
        items.hover(
            function () {
                dollar(this).addClass('hover');
            },
            function () {
                dollar(this).removeClass('hover');
            }
        )
    },

    /**
     * Set navigation opacity
     */         
    navigationOpacity: function () {
        if (BrowserDetect.browser == 'Firefox' && BrowserDetect.OS == 'Mac') {
            return;
        }      
        dollar("#nav ul a").not('.current').each(function (i) {
            
            dollar(this).css('opacity', 0.9);
            
            dollar(this).hover ( 
                function () {
                    dollar(this).css('opacity', 1.0);
                },
                function () {
                    dollar(this).css('opacity', 0.9);
                }
            );
        });
    },
    
    /**
     * Preload images
     * @param {Array} images array with names of images   
     */               
    preloadImages: function (images) {
        for (var i = 0; i < images.length; i++) {
            var image = new Image();
            image.src = images[i];
        }
    }
}




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.userAgent,
			subString: "OmniWeb",
			versionSearch: "OmniWeb/",
			identity: "OmniWeb"
		},
		{
			string: navigator.vendor,
			subString: "Apple",
			identity: "Safari"
		},
		{
			prop: window.opera,
			identity: "Opera"
		},
		{
			string: navigator.vendor,
			subString: "iCab",
			identity: "iCab"
		},
		{
			string: navigator.vendor,
			subString: "KDE",
			identity: "Konqueror"
		},
		{
			string: navigator.userAgent,
			subString: "Firefox",
			identity: "Firefox"
		},
		{
			string: navigator.vendor,
			subString: "Camino",
			identity: "Camino"
		},
		{		// for newer Netscapes (6+)
			string: navigator.userAgent,
			subString: "Netscape",
			identity: "Netscape"
		},
		{
			string: navigator.userAgent,
			subString: "MSIE",
			identity: "Explorer",
			versionSearch: "MSIE"
		},
		{
			string: navigator.userAgent,
			subString: "Gecko",
			identity: "Mozilla",
			versionSearch: "rv"
		},
		{ 		// for older Netscapes (4-)
			string: navigator.userAgent,
			subString: "Mozilla",
			identity: "Netscape",
			versionSearch: "Mozilla"
		}
	],
	dataOS : [
		{
			string: navigator.platform,
			subString: "Win",
			identity: "Windows"
		},
		{
			string: navigator.platform,
			subString: "Mac",
			identity: "Mac"
		},
		{
			string: navigator.platform,
			subString: "Linux",
			identity: "Linux"
		}
	]

};

BrowserDetect.init();

dollar(document).ready(function () {
    BRE.init();   
});