/* javascript function to update form field
*  field		form field that is being counted
*  count		form field that will show characters left
*  maxchars 	maximum number of characters
*/
function characterCount(field, count, maxchars) {
if (field.value.length > maxchars) {
field.value = field.value.substring(0, maxchars);
alert("Error:\n\n- You are only allowed to enter up to "+maxchars+" characters.");
} else {
count.value = maxchars - field.value.length;
}
}