// JavaScript Document

var newimg;
var imgsArray = new Array();
imgsArray[0] = "home-2a.jpg";
imgsArray[1] = "home-1a.jpg";
imgsArray[2] = "home-4a.jpg";
imgsArray[3] = "home-3a.jpg";
imgsArray[4] = "home-5a.jpg";

var newimgInc = 1;
var timer = 0;



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();





function homefade() {

	newimg = document.createElement("img");
	newimg.src = "images/"+imgsArray[newimgInc];
	newimg.style.opacity = "0";
	newimg.style.filter = "alpha(opacity=0)";
	homediv.appendChild(newimg);
	if (newimgInc == (imgsArray.length-1)) {
		newimgInc = 0;
	} else {
		newimgInc++;
	};
	
	timer = setInterval("homefadeTrans();", 10);	

}

var trans = 0;
function homefadeTrans() {

	if (trans == 100) {
		clearTimeout(timer);
		timer = 0;
		trans = 0;
		
		homediv.removeChild(homediv.getElementsByTagName("img")[0]);		
		setTimeout("homefade();", 3000);
		return false;
	};

	newimg.style.opacity = trans/100;
	newimg.style.filter = "alpha(opacity="+trans+")";
	trans = trans+1;

}

var homediv;
function getElements() {
	
	if (document.getElementById("homeimg")) {
		homediv = document.getElementById("homeimg");
	
		var preLoad = new Array();
		for (var j=0; j<imgsArray.length; j++) {
			preLoad[j] = new Image(580,520)
			preLoad[j].src = "images/"+imgsArray[j];
		};
		setTimeout("homefade();", 3000);
	
	};
}


//ONDOM READY FUNCTION
//--------------------

function onDomReady() {
	getElements();
};


function onDomReadyLoad() {

	//quit if this function has already been called
	if (arguments.callee.done) return;
	
	//flag this function so we don't do the same thing twice
	arguments.callee.done = true;
	
	//kill the timer
	if (_timer) {
		clearInterval(_timer);
		_timer = null;
	};
	
    onDomReady();
    
	preloadImages();
	
};

//CALL ONDOMREADY FUNCTION
//for Mozilla
if (document.addEventListener) {
	document.addEventListener("DOMContentLoaded", onDomReadyLoad, false);
};

/*for Internet Explorer*/
/*@cc_on @*/
/*@if (@_win32)
	document.write("<script id=__ie_onload defer src=javascript:void(0)><\/script>");
	var script = document.getElementById("__ie_onload");
	script.onreadystatechange = function() {
		if (this.readyState == "complete") {
			onDomReadyLoad(); // call the onload handler
		};
	};
/*@end @*/

//for Safari
if (/WebKit/i.test(navigator.userAgent)) {
	var _timer = setInterval(function() {
		if (/loaded|complete/.test(document.readyState)) {
			onDomReadyLoad();
		};
	}, 10);
};

//for other browsers
window.onload = onDomReadyLoad;

function preloadImages(){
		if (document.images)
		{
		  preload_image_object = new Image();
		  // set image url
		  image_url = new Array();
		  image_url[0] = "http://www.pure-d-zign.co.uk/images/menu_bg2.gif";
		  image_url[1] = "http://www.pure-d-zign.co.uk/images/sm_menu_bg2.gif";		  
	
		   var i = 0;
		   for(i=0; i<=3; i++) 
			 preload_image_object.src = image_url[i];
		}	
}