// fieldname, warningname, remainingname, maxchars
function CheckFieldLength(fn,wn,rn,mc) {
  var len = document.getElementById(fn).value.length;
  var str=document.getElementById(fn).value;
  
  if (len == 301)
  {
  	document.getElementById(fn).value = str.substring(0,str.length-1);
  	len--;
  }
  
  if (len > mc) {
    fn.value = fn.value.substring(0,mc);
    len = mc;
  }
  document.getElementById(wn).innerHTML = len;
  document.getElementById(rn).innerHTML = mc - len;
  
  
  
}