//detect browser type
var isBrowserNetscpape = (document.layers) ? true : false;
var isBrowserMozilla = document.getElementById? true : false;
var isBrowserIE = (document.all) ? true : false;

//Fade in and out logic
var isBoolSetTimer;

function SetOpacity(id, level) 
{
    var element = document.getElementById(id); 
    
    element.style.zoom = 1;
    element.style.opacity = level;
    element.style.MozOpacity = level;
    element.style.KhtmlOpacity = level;
    element.style.filter = "alpha(opacity=" + (level * 100) + ");";
}

function FadeIn(id, intDuration)
{
    var fadeOutSteps = 20;
    var fadeOutDuration = 900;
    var interval= 4000;
    var duration = 10;  /* 1000 millisecond fade = 1 sec */
    var steps = 10;       /* number of opacity intervals   */
    var fadeInComplete;
    
    for (i = 0; i <= 1; i += (1 / steps)) 
    {
        setTimeout("SetOpacity('" + id + "', " + i + ")", i * duration); 
        fadeInComplete = i * duration;             
    }
    
    if(isBoolSetTimer)
    {
        //set the timeout to start after the fade in time and the interval to display the 
        //message on the screen have both completed
        setTimeout("FadeOut('" + id + "', " + fadeOutSteps + ", " + fadeOutDuration + ")", intDuration);
    }
    
    //Nifty("div#message","top bottom transparent");
}

function FadeOut(id, steps, duration) 
{
    if(isBoolSetTimer)
    {
        var fadeOutComplete;       
        for (i = 0; i <= 1; i += (1 / steps)) 
        {
            setTimeout("SetOpacity('" + id + "', "  + (1 - i) + ")", i * duration);
            fadeOutComplete = i * duration;
        }
        //completely hide the displayed message after the fade effect is complete
        setTimeout("Hide()", fadeOutComplete);
    }
}

function Hide()
{
    ClearMessage()
}


function SetMessageWithTimer(textCurrentMessage, intDuration)
{
    if(intDuration == 0)
    {
        intDuration = 10000;
    }
    else
    {
        intDuration = intDuration * 1000;
    }
        
    if (isBrowserIE)
    {
        document.getElementById('divMessageText').innerText = textCurrentMessage;
        document.getElementById('divMessageArea').style.visibility = 'visible';
    }
    
    if(isBrowserMozilla)
    {
        document.getElementById('divMessageText').innerHTML = textCurrentMessage;
        document.getElementById('divMessageArea').style.visibility = 'visible';
    }
    
    isBoolSetTimer = true;
    FadeIn('divMessageArea', intDuration);
}

function SetMessageWithoutTimer(textCurrentMessage)
{
    var intDuration = 10000;
    
    if (isBrowserIE)
    {
        document.getElementById('divMessageText').innerText = textCurrentMessage;
        document.getElementById('divMessageArea').style.visibility = 'visible';
    }
    
    if(isBrowserMozilla)
    {
        document.getElementById('divMessageText').innerHTML = textCurrentMessage;
        document.getElementById('divMessageArea').style.visibility = 'visible';
    }
    
    isBoolSetTimer = false;
    FadeIn('divMessageArea', intDuration);
}

function ClearMessage()
{    
    if (isBrowserIE)
    {
        document.getElementById('divMessageText').innerText = "";
        document.getElementById('divMessageArea').style.visibility = 'hidden';
    }
    
    if(isBrowserMozilla)
    {
        document.getElementById('divMessageText').innerHTML = "";
        document.getElementById('divMessageArea').style.visibility = 'hidden';
    }
}

//Browser Detection
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: "Chrome",
			identity: "Chrome"
		},
		{ 	string: navigator.userAgent,
			subString: "OmniWeb",
			versionSearch: "OmniWeb/",
			identity: "OmniWeb"
		},
		{
			string: navigator.vendor,
			subString: "Apple",
			identity: "Safari",
			versionSearch: "Version"
		},
		{
			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.userAgent,
			   subString: "iPhone",
			   identity: "iPhone/iPod"
	    },
		{
			string: navigator.platform,
			subString: "Linux",
			identity: "Linux"
		}
	]

};
BrowserDetect.init();