// timer a fadeeffektekhez		
var count = 2;
var timeOut = 5000;
var atmenet = 2000;
var imagesNum = 7;
var kieg = 8;



function opacity(id, opacStart, opacEnd, millisec) {
	//speed for each frame
	var speed = Math.round(millisec / 100);
	var timer = 0;

	//determine the direction for the blending, if start and end are the same nothing happens
	if(opacStart > opacEnd) {
		for(i = opacStart; i >= opacEnd; i--) {
			setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed));
			timer++;
		}
	} else if(opacStart < opacEnd) {
		for(i = opacStart; i <= opacEnd; i++)
			{
			setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed));
			timer++;
		}
	}
}

//change the opacity for different browsers
function changeOpac(opacity, id) {
	var object = document.getElementById(id).style; 
	object.opacity = (opacity / 100);
	object.MozOpacity = (opacity / 100);
	object.KhtmlOpacity = (opacity / 100);
	object.filter = "alpha(opacity=" + opacity + ")";
}

function shiftOpacity(id, millisec) {
	//if an element is invisible, make it visible, else make it ivisible
	if(document.getElementById(id).style.opacity == 0) {
		opacity(id, 0, 100, millisec);
	} else {
		opacity(id, 100, 0, millisec);
	}
}

function blendimage(divid, imageid, imagefile, millisec) {
	var speed = Math.round(millisec / 100);
	var timer = 0;
	
	//set the current image as background
	//document.getElementById(divid).style.paddingLeft = '1px';
	//alert(document.getElementById(imageid).style.backgroundImage);
	document.getElementById(divid).style.backgroundImage = document.getElementById(imageid).style.backgroundImage;
	document.getElementById(divid).style.backgroundPosition="1px center";
	
	//make image transparent
	changeOpac(0, imageid);
	
	//make new image
	document.getElementById(imageid).style.backgroundImage = 'url('+imagefile+')';
	document.getElementById(imageid).style.marginLeft = '1px';

	//fade in image
	for(i = 0; i <= 100; i++) {
		setTimeout("changeOpac(" + i + ",'" + imageid + "')",(timer * speed));
		timer++;
	}
}

function currentOpac(id, opacEnd, millisec) {
	//standard opacity is 100
	var currentOpac = 100;
	
	//if the element has an opacity set, get it
	if(document.getElementById(id).style.opacity < 100) {
		currentOpac = document.getElementById(id).style.opacity * 100;
	}

	//call for the function that changes the opacity
	opacity(id, currentOpac, opacEnd, millisec)
}



setTimeout('imageReplace()',timeOut);

timeOut += atmenet;

function imageReplace() {
	
	blendimage('blenddiv','blendimage', '/n/netforum.hu/files/design/netforum/images/fade/kep_'+count+'.jpg',2000);
	
	setTimeout('imageReplace()',timeOut);
	
	count++;
	if (count==imagesNum)
		count = 1;
	
}







window.onresize = function(){
	pozicional();	
}

//pozicional();

function pozicional() {
	
	
	
	var winW = 0, winH = 0;
	if (parseInt(navigator.appVersion)>3) {
		 if (navigator.appName=="Netscape") {
		  winW = window.innerWidth;
		  winH = window.innerHeight;
		 }
		 if (navigator.appName.indexOf("Microsoft")!=-1) {
		  winW = document.body.offsetWidth;
		  winH = document.body.offsetHeight;
		 }
	}
	var p = (winW/2)-(904/2)-kieg;
	
	if (p<=0)
		p = 1;
		
	//document.getElementById('szovegDoboz').style.left=p+'px';
}


function setVideo(video) {
	parent.video.location.href=video;
}

function nothing() {
	// nothing! :)
}