/* 
 * Calculate the charge and total on the gift contribution form
 */

function CalculateTotal(frm) {
	/**
    var contribution = parseFloat(frm.amount.value)
    var total = 0
    var charge1 = 0.045
    var charge2 = 0.25
    var charge = 0

        charge = (contribution * charge1)
        charge = charge + charge2
        
        total = contribution + charge

    // Display the total rounded to two decimal places
    frm.charge.value = round_decimals(charge, 2)
    frm.total.value = round_decimals(total, 2)
    */
}

function round_decimals(original_number, decimals) {
    var result1 = original_number * Math.pow(10, decimals);
    var result2 = Math.round(result1);
    var result3 = result2 / Math.pow(10, decimals);
    return pad_with_zeros(result3, decimals);
}

function pad_with_zeros(rounded_value, decimal_places) {

    // Convert the number to a string
    var value_string = rounded_value.toString();

    // Locate the decimal point
    var decimal_location = value_string.indexOf(".");

    // Is there a decimal point?
    if (decimal_location == -1) {

        // If no, then all decimal places will be padded with 0s
        decimal_part_length = 0;
        // If decimal_places is greater than zero, tack on a decimal point
        value_string += decimal_places > 0 ? "." : "";
    }
    else {

        // If yes, then only the extra decimal places will be padded with 0s
        decimal_part_length = value_string.length - decimal_location - 1;
    }

    // Calculate the number of decimal places that need to be padded with 0s
    var pad_total = decimal_places - decimal_part_length;

    if (pad_total > 0) {

        // Pad the string with 0s
        for (var counter = 1; counter <= pad_total; counter++)
            value_string += "0";
        }
    return value_string;
}