// function parameters are:
//  field - the string field
//  count - the field for remaining characters number
//  max - the maximum number of characters 
function CountLeft(field, count, max) {
    // if the length of the string in the input field is greater than the max value, trim it
    if (field.value.length > max)
        field.value = field.value.substring(0, max);
    //else
    // calculate the remaining characters
    //    count.value = max - field.value.length;
}