function numberFormat(nStr){
		  nStr += '';
		  x = nStr.split('.');
		  x1 = x[0];
		  x2 = x.length > 1 ? '.' + x[1] : '';
		  var rgx = /(\d+)(\d{3})/;
		  while (rgx.test(x1))
			x1 = x1.replace(rgx, '$1' + ',' + '$2');
		  return x1 + x2;
		}

		function stripNonNumeric( str ){
		  str += '';
		  var rgx = /^\d|\.|-$/;
		  var out = '';
		  for( var i = 0; i < str.length; i++ ){
			if( rgx.test( str.charAt(i) ) ){
			  if( !( ( str.charAt(i) == '.' && out.indexOf( '.' ) != -1 ) ||
					 ( str.charAt(i) == '-' && out.length != 0 ) ) ){
				out += str.charAt(i);
			  }
			}
		  }
		  return out;
		}

function serbestpiyasaHesapla(){
    miktar = stripNonNumeric(document.serbestpiyasaThemeForm.serbestpiyasaMiktar.value);
    kur1 = document.serbestpiyasaThemeForm.serbestPiyasaKur1.value;
    kur2 = document.serbestpiyasaThemeForm.serbestPiyasaKur2.value;

    carpan = miktar / kur2;
    tutar = carpan * kur1;
    
    document.serbestpiyasaThemeForm.serbestpiyasaMiktar.value = numberFormat(miktar);
    document.serbestpiyasaThemeForm.serbestpiyasaTutar.value = numberFormat(tutar.toFixed(2));
}