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

function selectcur(mena, useFocus){
  if (mena == 'SKK'){
	
	
    document.getElementById("EUR").style.background = '#ffd5d5';
    document.getElementById("SKK").style.background = 'White';  
    document.getElementById("skk-eur").className = "set"; 
    document.getElementById("eur-skk").className= ""; 
    if(useFocus){
    document.getElementById("SKK").focus();
    }
    valuta = 'SKK';
    cislo = '';
  } else {
    document.getElementById("SKK").style.background = '#ffd5d5';
    document.getElementById("EUR").style.background = 'White';
    document.getElementById("skk-eur").className = "";
    document.getElementById("eur-skk").className = "set";
    if(useFocus){
    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);
    }
}

function setNewKurz(){
    document.getElementById("kurzTextBox").removeAttribute("disabled");
}

function setKurz(newKurz){
    kurz = newKurz;
    document.getElementById("kurzTextBox").value = newKurz;
    document.getElementById("kurzTextBox").setAttribute("disabled","disabled");
}



function showIlayer(){
    if(document.getElementById("e-calc").style.visibility == 'hidden'){
        document.getElementById("e-calc").style.visibility = 'visible';   
    }else{
        document.getElementById("e-calc").style.visibility = 'hidden';
        clearinp();
        
    }
}