im1 = new Image();
im1.src = 'nota.gif';
im2 = new Image();
im2.src = 'notahneda.gif';
im3 = new Image();
im3.src = 'nota800.gif';
im4 = new Image();
im4.src = 'notahneda800.gif';

function nota(n){
 document['nota'+n].src='nota800.gif';
}
function notapryc(n){
 document['nota'+n].src='notahneda800.gif';
}
function notai(n){
 document['nota'+n].src='nota.gif';
}
function notapryci(n){
 document['nota'+n].src='notahneda.gif';
}

//okna
function okno(adresaokna, vyska, sirka){
if (screen.width<1024 && sirka>770) sirka=750; 
if (screen.width<1024 && vyska>500) vyska=500;
if (screen.width==1024 && vyska>653) vyska=653;
if (screen.width==1024 && sirka>950) sirka=950;
if (screen.width>1279 && vyska>900) vyska=900;
if (screen.width>1279 && sirka>1150) sirka=1150;
 
   window.open('reference/'+adresaokna+'.htm',adresaokna,'width='+sirka+', height='+vyska+', scrollbars, resizable, top=10, left=10, screenY=10, screenX=10');
}

function okno1(adresaokna, vyska, sirka){
   window.open('foto/'+adresaokna+'.htm',adresaokna,'width='+sirka+', height='+vyska+',resizable, top=10, left=10, screenY=10, screenX=10');
}

//formular overit
function kontrolaform(f){
var prazdne="", chybne="", zprava="", nez, contr=0;
var ps=/.+@.+\.\w{2,}/;
var pr=/\s+/; 
var pt=/\s+[^\s]+/;
var p = f.elements;
for(var c=0; c < f.length; c++){
var p = f.elements[c];
if (p.type=="text" || p.type=="textarea"){
     if ((p.value=="") || (pr.test(p.value)==true) && (pt.test(p.value)!=true) || (p.name=="Email" && p.value=="@")) prazdne+="\n"+ p.name; 
		}		
if (p.name=="Email" && (p.value=="@" || p.value=="")) contr=1;
if (p.name=="Email" && (p.value!="@" && p.value!="") && ps.test(p.value)!=true) chybne+="\n"+ p.name;   	
	}
if (prazdne.indexOf("Telefon")>-1 && contr==1) { 
    zprava+="________________________________\n\nJedno z t\u011Bchto pol\xED mus\xED b\xFDt vypln\u011Bno:\n________________________________\n\n Telefon / E-mail";	 
    prazdne=prazdne.replace(/\nTelefon\nEmail/,"");
		nez=true;
		}
if (contr==1 && f.Telefon.value!="") prazdne=prazdne.replace(/\nEmail/,"");
if (contr==0 && f.Telefon.value=="") prazdne=prazdne.replace(/\nTelefon/,"");
if (chybne!="")	{ 
       zprava="\n\n___________________________\n\n Toto pole je vypln\u011Bno chybn\u011B:\n___________________________\n"+chybne+'\n'+zprava;	
		prazdne=prazdne.replace(/\nEmail/,"");	 
			 }
if (prazdne!="") zprava="\n___________________________\n\n Tato pole nejsou vypln\u011Bna:\n___________________________\n"+prazdne+'\n'+zprava;

if (prazdne!="" || chybne!="" || nez) {
      alert(zprava+"\n\n\nZPR\xC1VA NEBYLA ODESL\xC1NA!\n");
      return false;                                                                     
    }
}

function kontrolaformen(f){
var prazdne="", chybne="", zprava="", nez, contr=0;
var ps=/.+@.+\.\w{2,}/;
var pr=/\s+/; 
var pt=/\s+[^\s]+/;
var p = f.elements;
for(var c=0; c < f.length; c++){
var p = f.elements[c];
if (p.type=="text" || p.type=="textarea"){
     if ((p.value=="") || (pr.test(p.value)==true) && (pt.test(p.value)!=true) || (p.name=="Email" && p.value=="@")) prazdne+="\n"+ p.name; 
		}		
if (p.name=="Email" && (p.value=="@" || p.value=="")) contr=1;
if (p.name=="Email" && (p.value!="@" && p.value!="") && ps.test(p.value)!=true) chybne+="\n"+ p.name;   	
	}
if (prazdne.indexOf("Phone")>-1 && contr==1) { 
    zprava+="________________________________\n\nOne of this fields is required:\n________________________________\n\n Phone / E-mail";	 
    prazdne=prazdne.replace(/\nPhone\nEmail/,"");
		nez=true;
		}
if (contr==1 && f.Phone.value!="") prazdne=prazdne.replace(/\nEmail/,"");
if (contr==0 && f.Phone.value=="") prazdne=prazdne.replace(/\nPhone/,"");
if (chybne!="")	{ 
       zprava="\n\n___________________________\n\n This field is wrong:\n___________________________\n"+chybne+'\n'+zprava;	
		prazdne=prazdne.replace(/\nEmail/,"");	 
			 }
if (prazdne!="") zprava="\n___________________________\n\n These fields are empty:\n___________________________\n"+prazdne+'\n'+zprava;

if (prazdne!="" || chybne!="" || nez) {
      alert(zprava+"\n\n\nYour message was not send!\n");
      return false;                                                                     
    }
}