var isNN7 = ((navigator.appName.indexOf('Netscape') != -1) && (parseInt(navigator.appVersion) > 4));
function textKey(f,m) {
  var maxLength = m;
  if (isNN7) {
    var lfc = new Array();
    var lfc = (f.Message.value.split("\n"));
    maxLength -= lfc.length - 1;
  }
  var charleft = 0;
  if (f.Message.value.length > maxLength) {
    f.Message.value = f.Message.value.substring(0,maxLength);
    alert('Maximum character length reached');
  } else {
    charleft = maxLength - f.Message.value.length;
  }
  f.numCNT.value = charleft;
}