var maxCelychCisel = 10;
var maxDesatinnychCiselSkk = 2;
var maxDesatinnychCiselEur = 4;

var kurz = '30.1260';

var inputSkk = '';
var inputEur = '';

function oNu(text, max) {
var cnt = text.length;
var ret = '';
var woDOT = true;
var beh = 0;
var zaBodkou = 0;
for (i=0;i<cnt;i++) {
		    var znak = text.substring(i,i+1);
		    if (znak == ',') {znak = '.';}
		    if (znak >= '0' && znak <='9') {
						   
						   if (woDOT) {
						   if (beh<maxCelychCisel) {
										ret = ret + znak;
										beh++;
										}

										} else {
										if (zaBodkou<max) {
										ret = ret + znak;
										zaBodkou++;
										}
										}
										}
										if (znak == '.' && woDOT) {
										woDOT = false;
										ret = ret + znak;
										}
										}
										if (ret=='.') {ret = '';}
										return ret;
										}
										
										function writeCurr(skk, eur, event) {
										
										if ((event.keyCode>34 && event.keyCode<41)) {return;}
										if (skk == null) {
										eur = oNu(eur,maxDesatinnychCiselEur);
										skk = (eur*kurz).toFixed(maxDesatinnychCiselSkk)*1;
										if (skk == 0) {skk = '';}
										} else {
										skk = oNu(skk,maxDesatinnychCiselSkk);
										eur = (skk/kurz).toFixed(maxDesatinnychCiselEur)*1;
										if (eur == 0) {eur = '';}
										}
										if (document.getElementById('inputSkk').value!=skk) {document.getElementById('inputSkk').value = skk;}
										if (document.getElementById('inputEur').value!=eur) {document.getElementById('inputEur').value = eur;}
										}
										
										/*if (document.getElementById('inputSkk').offsetHeight == 13) {
										document.getElementById('inputSkk').style.height = '18px';
										document.getElementById('inputEur').style.height = '18px';
										} */