/* konfigurácia */
var kurz = '30.1260';
var maxCelychCisel = 10;
var maxDesatinnychCiselSkk = 2;
var maxDesatinnychCiselEur = 4;

function ibaCisla(text, max) {
  var cnt = text.length;
    var ret = '';
      var nemamBodku = true;
        var predBodkou = 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') {
			      // max. celych cisel
			            if (nemamBodku) {
				            if (predBodkou<maxCelychCisel) {
					              ret = ret + znak;
						                predBodkou++;
								        }
									      // max. desatinnych sicel;
									            } else {
										            if (zaBodkou<max) {
											              ret = ret + znak;
												                zaBodkou++;
														        }
															      }
															          }
																      if (znak == '.' && nemamBodku) {
																            nemamBodku = false;
																	          ret = ret + znak;
																		      }
																		        }
																			  if (ret=='.') {ret = '';}
																			    return ret;
																			    }
																			    
																			    function writeCurr(skk, eur, event) {
																			      // filter specialnych klaves
																			        if ((event.keyCode>34 && event.keyCode<41)) {return;}
																				  if (skk == null) {
																				      eur = ibaCisla(eur,maxDesatinnychCiselEur);
																				          skk = (eur*kurz).toFixed(2)*1;
																					      if (skk == 0) {skk = '';}
																					        } else {
																						    skk = ibaCisla(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;}
																								  }