function valid_edit(edit) {
  return (edit.value != '');
  }

function valid_radio(radio) {
  var result = false;
  for (var i = 0; i <= radio.length-1; i++) {
    if (radio[i].checked) {
      result = true;
      break;
      }
    }
  return result;
  }

function valid_checkbox(checkbox) {
  return checkbox.checked;
  }

function valid_select(select) {
  return (select.options[select.selectedIndex].value != 0);
  }

  function addCommas(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;
    }