function Wygaszanie(img,value,speed) {
		if (!img) img = this;
		if (!value) value = 0.3;
		if (!speed) speed = 1500;

		var timer = null,
		startTime = (new Date).getTime(),
		elapsed = null,
		d = null;

		timer = setInterval(function(){
			elapsed = (new Date).getTime() - startTime;

			if(elapsed < speed) {
				d = 1 - (elapsed / speed * value);
				img.style.opacity = d;
				img.style.filter = 'alpha(opacity = ' + (d * 100) + ')';
				
			}
			else {
				clearInterval(timer);
				img.style.opacity = 0;
				img.style.filter = 'alpha(opacity = ' + (0) + ')';
			}
		},5);
	}
	
function Zanikanie(img,value,speed) {
		if (!img) img = this;
		if (!value) value = 0;
		if (!speed) speed = 1500;

		var timer = null,
		startTime = (new Date).getTime(),
		elapsed = null,
		d = null;

		timer = setInterval(function(){
			elapsed = (new Date).getTime() - startTime;

			if(elapsed < speed) {
				d = 1 - (elapsed / speed * value);
				img.style.opacity = d;
				img.style.filter = 'alpha(opacity = ' + (d * 100) + ')';
				
			}
			else {
				clearInterval(timer);
				img.style.opacity = value;
				img.style.filter = 'alpha(opacity = ' + (value * 100) + ')';
				
			}
		},5);
	}

	
function Pojawianie(img,value,speed) {
		if (!img) img = this;
		if (!value) value = 1;
		if (!speed) speed = 1500;


		var timer = null,
		startTime = (new Date).getTime(),
		elapsed = null,
		d = null;

		timer = setInterval(function(){
			elapsed = (new Date).getTime() - startTime;

			if(elapsed < speed) {
				d = (elapsed / speed * value);
				img.style.opacity = d;
				img.style.filter = 'alpha(opacity = ' + (d * 100) + ')';
				
			}
			else {
				clearInterval(timer);
				img.style.opacity = value;
				img.style.filter = 'alpha(opacity = ' + (value * 100) + ')';
				
			}
		},5);
	}

	
function Rozswietlanie(img,value,speed) {

	var timer = null,
	startTime = (new Date).getTime(),
	elapsed = null,
	d = null;

	timer = setInterval(function(){
		elapsed = (new Date).getTime() - startTime;

		if(elapsed < speed) {
			d = elapsed / speed * value;
			img.style.opacity = d;
			img.style.filter = 'alpha(opacity = ' + (d * 100) + ')';
		}
		else {
			clearInterval(timer);
			img.style.opacity = value;
			img.style.filter = 'alpha(opacity = ' + (value * 100) + ')';
		}
	},2);
}

function Rozswietlanie2(img,value,speed) {

	var timer = null,
	startTime = (new Date).getTime(),
	elapsed = null,
	d = null;

	timer = setInterval(function(){
		elapsed = (new Date).getTime() - startTime;

		if(elapsed < speed) {
			d = elapsed / speed * value;
			img.style.opacity = d;
			img.style.filter = 'alpha(opacity = ' + (d * 100) + ')';
		}
		else {
			clearInterval(timer);
			img.style.opacity = value;
			img.style.filter = 'alpha(opacity = ' + (value * 100) + ')';
		}
	},2);
}

function Rozwijanie(img,value,speed) {

	var timer = null,
	startTime = (new Date).getTime(),
	elapsed = null,
	d = null;

	timer = setInterval(function(){
		elapsed = (new Date).getTime() - startTime;

		if(elapsed < speed) {
			d = elapsed / speed * value;
			img.style.height = d + 'px';
		}
		else {
			clearInterval(timer);
			img.style.height = value + 'px';
		}
	},2);
}



function Intro() {


	
	document.getElementById('artykul').style.display = 'none';
	document.getElementById('artykul').style.overflow = 'hidden';
	document.getElementById('artykul').style.opacity = 0;
	document.getElementById('hdr').style.display = 'none';
	document.getElementById('hdr').style.overflow = 'hidden';
	document.getElementById('hdr').style.opacity = 0;
	
	timer1 = setInterval(function(){
		document.getElementById('hdr').style.display = 'block';
		Rozswietlanie(document.getElementById('hdr'),1,400);
		clearInterval(timer1);
	},50);
	
	timer2 = setInterval(function(){
		document.getElementById('artykul').style.display = 'block';
		Rozswietlanie(document.getElementById('artykul'),1,800);
		clearInterval(timer2);
	},200);

	timer3 = setInterval(function(){
		document.getElementById('bg').style.display = 'block';
		Zanikanie(document.getElementById('bg'),0.5,1000);
		clearInterval(timer3);
	},600);

}