function setValue() {
nr=1
}
function button(btn,act){

browserName = navigator.appName;
browserVer = parseInt(navigator.appVersion);
   ver="no";
   if (browserName == "Netscape" && browserVer >= 3) ver="ok";
   if (browserName == "Microsoft Internet Explorer" && browserVer >= 4) ver="ok";
if (ver=="ok") {
   img1_a = new Image;
   img1_a.src = "images/buttons/btnhome1.gif";
   img2_a = new Image;
   img2_a.src = "images/buttons/btnlpg1.gif";
   img3_a = new Image;
   img3_a.src = "images/buttons/btncennik1.gif";
   img4_a = new Image;
   img4_a.src = "images/buttons/btndojazd1.gif";
   img5_a = new Image;
   img5_a.src = "images/buttons/btnkontakt1.gif";
   img6_a = new Image;
   img6_a.src = "images/buttons/btnCalc.gif";
   img7_a = new Image;
   img7_a.src = "images/buttons/back1.gif";
   img8_a = new Image;
   img8_a.src = "images/buttons/btn.gif";
   img9_a = new Image;
   img9_a.src = "images/buttons/btn.gif";
   img10_a = new Image;
   img10_a.src = "images/buttons/btnzoom1.gif";
   img11_a = new Image;
   img11_a.src = "images/buttons/btnzoomout1.gif";


   img1_b = new Image;
   img1_b.src = "images/buttons/btnhome2.gif";
   img2_b = new Image;
   img2_b.src = "images/buttons/btnlpg2.gif";
   img3_b = new Image;
   img3_b.src = "images/buttons/btncennik2.gif";
   img4_b = new Image;
   img4_b.src = "images/buttons/btndojazd2.gif";
   img5_b = new Image;
   img5_b.src = "images/buttons/btnkontakt2.gif";
   img6_b = new Image;
   img6_b.src = "images/buttons/btnCalc2.gif";
   img7_b = new Image;
   img7_b.src = "images/buttons/back2.gif";
   img8_b = new Image;
   img8_b.src = "images/buttons/btn.gif";
   img9_b = new Image;
   img9_b.src = "images/buttons/btn.gif";
   img10_b = new Image;
   img10_b.src = "images/buttons/btnzoom2.gif";
   img11_b = new Image;
   img11_b.src = "images/buttons/btnzoomout2.gif";


   map1 = new Image;
   map1.src = "images/map/Map0.jpg";
   map2 = new Image;
   map2.src = "images/map/Map1.jpg";
   map3 = new Image;
   map3.src = "images/map/Map2.gif";
   map4 = new Image;
   map4.src = "images/map/Map3.gif";
   map5 = new Image;
   map5.src = "images/map/Map4.gif";
   
   label51 = new Image;
   label51.src = "images/buttons/ofirmie_r.gif";
   label52 = new Image;
   label52.src = "images/buttons/lpg_r.gif";
   label53 = new Image;
   label53.src = "images/buttons/cennik_r.gif";
   label54 = new Image;
   label54.src = "images/buttons/dojazd_r.gif";
   label55 = new Image;
   label55.src = "images/buttons/kontakt_r.gif";

   
   if(act=='1'){ img_act(btn)}
   if(act=='2'){ img_inact(btn)}
   if(act=='3'){ img_zoomin(btn)}
   if(act=='4'){ img_zoomout(btn)}
   if(act>'4'){ labelq(btn,act)}
   
  }
}
function img_act(imgName) {
   if (ver == "ok")
      {
       imgOn = eval(imgName + "_b.src");
       document [imgName].src = imgOn;
      }
   }

function img_inact(imgName) {
   if (ver == "ok")
      {
       imgOff = eval(imgName + "_a.src");
       document [imgName].src = imgOff;
      }
   }
   
function img_zoomin(imgName) {
   if (ver == "ok")
      {
       nr=nr+1
       if(nr==6){nr=5}
       imgCh = eval(imgName +nr+".src");
       document [imgName].src = imgCh;
      }
   }

function img_zoomout(imgName) {
   if (ver == "ok") {
       nr=nr-1
       if(nr==0){nr=1}
       imgCh = eval(imgName +nr+".src");
       document [imgName].src = imgCh;
  }
}

function labelq(imgName,act) {
   if (ver == "ok")
      {
       labeler = eval(imgName + act + ".src");
       document [imgName].src = labeler;
      }
   }
   
function Back(btn,act)
{
 window.history.back ();
}


function calculator(documentName) {
   window.open(documentName, "calculator", "width=550,height=320,center,toolbar=0,location=0,directories=0,status=1,menubar=0,scrollbars=0,resizable=0,copyhistory=0");
}

function wylicz(form){
	licz=1;
	control(form,"benzyna");
	control(form,"gaz");
	control(form,"instalacja");
	control(form,"zuzycie");
	if (licz ==0){}else{
	var zwrot;
	var zwrot2;
	var zwrot3;
	zwrot2=form.benzyna.value*form.zuzycie.value;
	zwrot3=form.gaz.value*form.zuzycie.value*1.15;
	zwrot=Math.round(form.instalacja.value/(zwrot2-zwrot3)*100);
	document.gazik.ile.value=zwrot;}
}

function control(form,field){
	if (field == "benzyna"){nazwa=form.benzyna.value;}
	if (field == "gaz"){nazwa=form.gaz.value;}
	if (field == "instalacja"){nazwa=form.instalacja.value;}
	if (field == "zuzycie"){nazwa=form.zuzycie.value;}
	if (nazwa == ""){alert("musisz podać wartość dla pola "+field);licz=0;return;}
	if (nazwa.indexOf(',',0)!=-1){alert("proszę użyć kropki zamiast przecinka");licz=0;return;}
}