// function parameters are: field - the string field, count - the field for remaining characters number and 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 - actually, don't this is a bad idea.
//            if (field.value.length > max)
//                field.value = field.value.substring(0, max);
//            else
    // calculate the remaining characters
        count.value = max - field.value.length;
}