ns6=(document.getElementById&&!document.all)?true:false;
ie4=(document.all&&!window.opera)?true:false;
ie7=(window.ActiveXObject)?true:false;
opera=(window.opera)?true:false;
var imgsTab0 = new Array('img/nav/onas0.gif','img/nav/aktualnosci0.gif','img/nav/partnerzy0.gif','img/nav/kontakt0.gif');
var imgsTab1 = new Array('img/nav/onas1.gif','img/nav/aktualnosci1.gif','img/nav/partnerzy1.gif','img/nav/kontakt1.gif');
function getEl(id){
	return obj = document.getElementById(id);
}
function cutStr(str,s,e){ 
	if(s!=null&&e!=null){return str.substring(s,e);	}
	if(s!=null){return str.substring(s,str.length);	}
	if(e!=null){return str.substring(0,e);}
}
function preload(){
	for (var i = 0; i<imgsTab0.length; i++){
		var img1 = new Image();
		var img2 = new Image();
		var img3 = new Image();
			img1.src = imgsTab0[i];
			img2.src = imgsTab1[i];
	}
}
function swapImgs(which_is_on){
	for (var i=0; i<imgsTab0.length; i++){
		var img = getEl('img'+i);
		if(img!=which_is_on){
			img.onmouseover = function(){
				this.src = imgsTab1[cutStr(this.id,3)]
			}
			img.onmouseout = function(){
				this.src = imgsTab0[cutStr(this.id,3)];
			}
			}
	}
}
function posLay(id){
	obj = getEl(id);
	w = parseInt(document.body.offsetWidth);
	obj.style.right = ((w-811)/2)+'px';
}