function dbi(ditem){
	return document.getElementById(ditem);
}

function setgcover(){
	var bgS=getBg();
	if(!dbi('gcover')){
		var dgcover=document.createElement("div");
		dgcover.id="gcover";
		dgcover.name="gcover";
		dgcover.style.width=bgS[0]+"px";
		dgcover.style.height=bgS[1]+"px";

		if (document.addEventListener) {
			dgcover.addEventListener('mousemove',function(event){getposition(event);},false);
			dgcover.addEventListener('mouseup',function(event){stopDrag(event);},false);
		} else if (document.attachEvent) {
			dgcover.attachEvent('onmousemove',function(event){getposition(event);});		
			dgcover.attachEvent('onmouseup',function(event){stopDrag(event);});
		}
		
		document.body.appendChild(dgcover);
		dbi('gcover').className="gcover"; //className musi byc dodane do istniejacego objektu w dokumencie
	} else {
		dgcover=document.getElementById('gcover');
		dgcover.style.width=bgS[0]+"px";
		dgcover.style.height=bgS[1]+"px";
	}
	return dgcover;
}

function setimgC(){
	if(!dbi('imgcnt')){
		var dimgcnt=document.createElement("div");
		dimgcnt.id="imgcnt";
		dimgcnt.name="imgcnt";
//		dimgcnt.style.left=(bgS[0]/2)+"px";
//		dimgcnt.style.top=(bgS[1]/2)+"px";
		
		document.body.appendChild(dimgcnt);
		dbi('imgcnt').className="imgcnt"; //className musi byc dodane do istniejacego objektu w dokumencie
	} else {
		dimgcnt=document.getElementById('imgcnt');
//		dimgcnt.style.width=(bgS[0]/2)+"px";
//		dimgcnt.style.height=(bgS[1]/2)+"px";
	}

	var imgsrc="<img src=\"images/przykrywka.png\" id=\"imgsrc\" style=\"display:none\">";
	imgsrc+="<div id=\"imgloader\" style=\"display:block\"> a fasf af af aasfdafd dfasdf as f</div>";
	dbi('imgcnt').innerHTML=imgsrc;
	
	if (document.addEventListener) {
//		dimgcnt.addEventListener('mousemove',function(event){getposition(event);},false);
		dbi('imgsrc').addEventListener('load',function(event){showimg();},false);
	} else if (document.attachEvent) {
//		dimgcnt.attachEvent('onmousemove',function(event){getposition(event);});
		dbi('imgsrc').attachEvent('onload',function(event){showimg();});
	}
}

function showimg(){
	var bgS=getBg();
	dbi('imgloader').style.display='none';
	dbi('imgsrc').style.display='block';
	dbi('imgcnt').style.left=bgS[0]/2-(dbi('imgsrc').width/2)+"px";
	dbi('imgcnt').style.top=bgS[1]/2-(dbi('imgsrc').height/2)+"px";
	imalpha=setInterval("imgalpha('"+dbi('imgsrc')+"',0,100)",3);
}

function imgalpha(it,abeg,aend){
//	itcop=it.style.opacity;
//	it.style.opacity=1;
	clearInterval(imalpha);
//	it.style.opacity=(obtop+((dchi+82)-it.style.top))*0.07)+"px";
}

function gimgresc(){
	
}

function getBg() {
  var myWidth = 0, myHeight = 0;
  if( typeof( window.innerWidth ) == 'number' ) {
    //Non-IE
    myWidth = window.innerWidth;
    myHeight = window.innerHeight;
  } else if( document.documentElement && ( document.documentElement.clientWidth || document.documentElement.clientHeight ) ) {
    //IE 6+ in 'standards compliant mode'
//	alert("1 = "+document.body.offsetHeight);
//	alert("2 = "+document.documentElement.clientHeight);
    myWidth = document.documentElement.clientWidth;
    myHeight = document.documentElement.clientHeight;
  } else if(document.body && (document.body.clientWidth || document.body.clientHeight)) {
    //IE 4 compatible
    myWidth = document.body.clientWidth;
    myHeight = document.body.clientHeight;
  }
  return Array(myWidth,myHeight);
}

function loadimg(imgitem){
	setgal();
	dbi('imgsrc').src=imgitem;
//	alert(dbi('imgsrc').width+"= asdf ="+dbi('imgsrc').height);
}

function setgal(){
	setgcover();
	setimgC();
}