// show fullscreen object
function toFullscreen(id,opacity,width,top){
	if (!opacity) opacity = 6;
	if (!width) width = 950;
	if (!top) top = 150;

	if (d = document.getElementById('overlay1')){
		d.style.display = 'block';
		document.getElementById('overlay2').style.display = 'block';
	} else {
		//overlay 1
		var divBig = document.createElement('div');
		divBig.setAttribute("id","overlay1");
	
		//overlay 2 div
		var divBigIn = document.createElement('div');
		divBigIn.setAttribute("id","overlay2");
		divBigIn.onclick = function () { document.getElementById('overlay1').style.display='none'; this.style.display='none'; }
		divBigIn.setAttribute("title","klikni pro zavøení");

		//overlayIn div
		var div = document.createElement('div');
		div.setAttribute("id","overlayIn");
		
		//read id object
		var idObject = document.getElementById(id).innerHTML;
		
		//clear div
		var closeImg = document.createElement('img');
		closeImg.setAttribute("src","images/close.png");
		closeImg.setAttribute("class","close");
		closeImg.setAttribute("alt","close");
		closeImg.setAttribute("title","zavøít");

		//clear div
		var clear = document.createElement('div');
		clear.setAttribute("class","clear");
		
		if (navigator.appName == "Microsoft Internet Explorer" && parseInt(navigator.appVersion) >= 4) {
			divBig.style.filter = 'alpha(opacity=' + opacity + '0)';
			divBigIn.style.top = top + 'px';
			div.style.width = width + 'px';
		} else {
			divBig.setAttribute("style", "opacity:0." + opacity);
			divBigIn.setAttribute("style","top:" + top + "px;");
			div.setAttribute("style","width:" + width + "px;");
		}
		
		//print
		document.body.appendChild(divBig);
		document.body.appendChild(divBigIn);
		document.getElementById('overlay2').appendChild(div);
		document.getElementById('overlayIn').innerHTML = idObject;
		document.getElementById('overlayIn').appendChild(closeImg);
		document.getElementById('overlayIn').appendChild(clear);
	}
}