var opacity=100;
var tickWidth= 10;
var isMSIE = false;
var isFF = false;

// Hide menu & text to avoid screen flash 
document.write('<link rel="stylesheet" href="../../style/index_script.css" type="text/css" media="screen" />');
		
function browserCheck(){

	if (/Firefox[\/\s](\d+\.\d+)/.test(navigator.userAgent)){ //test for Firefox/x.x or Firefox x.x (ignoring remaining digits);
		var ffVer=new Number(RegExp.$1) // capture x.x portion and store as a number
	}
	if (/MSIE (\d+\.\d+);/.test(navigator.userAgent)){ //test for MSIE x.x;
		var ieVer=new Number(RegExp.$1) // capture x.x portion and store as a number
	}
	if (/Opera[\/\s](\d+\.\d+)/.test(navigator.userAgent)){ //test for Opera/x.x or Opera x.x (ignoring remaining decimal places);
		var opVer=new Number(RegExp.$1) // capture x.x portion and store as a number
	}
	 
	return(  true );
}
 
function pageLoaded(){
	//var elText = window.document.getElementById('indexText');
	//if (elText) elText.style.visibility='hidden';
	var elImg= window.document.getElementById('indexOverlay');
	elImg.style.display='block';
	startFade();
	setTimeout('showTicker()',40);
	setTimeout('showPage()',3000);
}
function showTicker(){
	var el = window.document.getElementById('indexTicker');
	tickWidth += 1;
	if (tickWidth <=100){
		el.style.width = tickWidth + '%';
		setTimeout('showTicker()',40);
	}
}
function startFade(){
	var img = new Fader('indexOverlay', 100, 0, 3000, 50); 
	img.fade();

}
function showPage(){
	var el = window.document.getElementById('header');
	if (el) el.style.visibility='visible';
	el = window.document.getElementById('indexText');
	if (el) el.style.visibility='visible';
	el = window.document.getElementById('menu');
	if (el)  el.style.visibility='visible';
}
if (browserCheck()) {
	 if (isFF) onload=pageLoaded();
	 else onload=pageLoaded;
}

 
function Fader(strID, start, end, startDelay, fadeDelay){
	this.enabled = false;
	this.id = strID;
	this.opacityStart=start;
	this.opacityEnd=end;
	this.startDelayMS = startDelay;
	// Methods
	this.checkEnabled = checkEnabled;
	this.fade = fade;
	this.checkEnabled();
	
	this.fadeDelayMS = (fadeDelay) ? fadeDelay: 10;  
	this.fadeStep = 2;  
	if (document.getElementById) this.el = window.document.getElementById(strID);
	else if (document.all) this.el = window.document.all[strID];
	if(this.opacityStart==0) this.el.style.visibility='hidden';
 	if (this.isIE)	this.el.style.filter= "alpha(opacity=" + this.opacity + ")"; 
	else if (this.isFF || this.isSafari || this.isOpera) this.el.style.opacity =this.opacity/100;
		

function fade(){
	if (!this.enabled) return;
	
	if (this.startDelayMS > 0){
		var pThis = this;
		var f = function(){pThis.fade();}
		this.delayID =  setTimeout(f,  this.startDelayMS);
		this.startDelayMS=0
		return;
	}
	
	if (this.el  ){
		var timer = 0;
		if ( this.opacityStart< this.opacityEnd){
			for(i = this.opacityStart; i <= this.opacityEnd; i++) { 
				setTimeout("changeOpac(" + i + ",'" + this.id + "')",(timer * this.fadeDelayMS)); 
				timer++; 
				if (timer>(this.opacityEnd-10)) timer++; // increase delay towards end
			}
		}
		else{
			for(i = this.opacityStart; i >= this.opacityEnd; i=i-2) { 
				//if (timer > 75) window.status += ' ' + (timer * this.fadeDelayMS);
				setTimeout("changeOpac(" + i + ",'" + this.id + "')",(timer * this.fadeDelayMS)); 
				timer++; 
				if (i < (this.opacityEnd+10)) timer++; // increase delay towards end
			}		
		}
 
 
 	}
}

 

		
function checkEnabled(){
	this.isIE = false;
	this.isFF = false;
	this.isSafari = false;
	this.isOpera = false;
	// convert all characters to lowercase to simplify testing
	var agt=navigator.userAgent.toLowerCase();
	var app=navigator.appName.toLowerCase();
	
	 //alert( agt + '\n\n' + app);
	if (app.indexOf("microsoft")!=-1 && parseInt(navigator.appVersion)>=4) {
		this.enabled = true;
		this.isIE = true
	}
	if (agt.indexOf("firefox")!=-1  ) {
		this.enabled = true;
		this.isFF = true
	}
	if (agt.indexOf("safari")!=-1  ) {
		this.enabled = true;
		this.isSafari = true
	} 
	if (agt.indexOf("opera")!=-1  ) {
		this.enabled = true;
		this.isOpera = true
	} 
}

}

//change the opacity for different browsers 
function changeOpac(opacity, id) { 
    var object = document.getElementById(id).style; 
	object.visibility='visible';;
    object.opacity = (opacity / 100); 
    object.MozOpacity = (opacity / 100); 
    object.KhtmlOpacity = (opacity / 100); 
    object.filter = "alpha(opacity=" + opacity + ")"; 
	
	if (opacity==100 && object.filter)   object.filter = null;
	if (opacity==0 )   object.display = 'none';
	 
} 
function checkEnabled(){
	this.isIE = false;
	this.isFF = false;
	this.isSafari = false;
	this.isOpera = false;
	// convert all characters to lowercase to simplify testing
	var agt=navigator.userAgent.toLowerCase();
	var app=navigator.appName.toLowerCase();
	
	 //alert( agt + '\n\n' + app);
	if (app.indexOf("microsoft")!=-1 && parseInt(navigator.appVersion)>=4) {
		this.enabled = true;
		this.isIE = true
	}
	if (agt.indexOf("firefox")!=-1  ) {
		this.enabled = true;
		this.isFF = true
	}
	if (agt.indexOf("safari")!=-1  ) {
		this.enabled = true;
		this.isSafari = true
	} 
	if (agt.indexOf("opera")!=-1  ) {
		this.enabled = true;
		this.isOpera = true
	} 
}