kurz = 2.8200;
var valuta;
cislo = '';
function clearinp(){
	document.getElementById("SKK").value = '';
	document.getElementById("EUR").value = '';            
	cislo = '';
}

function selectcur(mena){
  if (mena == 'SKK'){
	
	
	document.getElementById("EUR").style.background = 'url(images/kalkulacka/bg2.gif)';
	document.getElementById("SKK").style.background = 'url(images/kalkulacka/bg1.gif)';  
	document.getElementById("skk-eur").src = 'images/kalkulacka/eur-skk.gif'; 
	document.getElementById("eur-skk").src = 'images/kalkulacka/skk-eur2.gif'; 
	document.getElementById("SKK").focus();
	valuta = 'SKK';
	cislo = '';
  } else {
	document.getElementById("SKK").style.background = 'url(images/kalkulacka/bg2.gif)';
	document.getElementById("EUR").style.background = 'url(images/kalkulacka/bg1.gif)';
	document.getElementById("skk-eur").src = 'images/kalkulacka/eur-skk2.gif';
	document.getElementById("eur-skk").src = 'images/kalkulacka/skk-eur.gif'; 
	document.getElementById("EUR").focus();
	valuta = 'EUR';
	cislo = '';
  }
}

function backspace(){

	  if (valuta == 'SKK'){document.getElementById("SKK").value = document.getElementById("SKK").value.toString().substring(0,document.getElementById("SKK").value.toString().length-1);}
	  if (valuta == 'EUR'){document.getElementById("EUR").value = document.getElementById("EUR").value.toString().substring(0,document.getElementById("EUR").value.toString().length-1);}
	    
	    
	if (valuta == 'SKK'){
	cislo = document.getElementById("SKK").value; 
  document.getElementById("SKK").value = cislo.replace(/[^0-9,]*/i, '');  
	document.getElementById("EUR").value = cislo.replace(/[^0-9,]*/i, '') / kurz;  
			  
	}else {
	cislo = document.getElementById("EUR").value;
  document.getElementById("EUR").value = cislo;
	document.getElementById("SKK").value = cislo * kurz;
	}
	    
}
 
function stlac(tlacitko){
	
	if (tlacitko == 'inter'){
	  if (valuta == 'SKK'){cislo = document.getElementById("SKK").value.replace(',', '.');}
	  if (valuta == 'EUR'){cislo = document.getElementById("EUR").value.replace(',', '.');} 
	}
	else {
	  cislo = cislo + tlacitko ;        
	}
	if (valuta == 'SKK'){
	document.getElementById("SKK").value = cislo.replace(/[^0-9,]*/i, '');  
	document.getElementById("EUR").value = (cislo.replace(/[^0-9,]*/i, '') / kurz).toFixed(2);  
			  
	}else {
	document.getElementById("EUR").value = cislo;
	document.getElementById("SKK").value = (cislo * kurz).toFixed(2);
	}
}