// // Calculate the total for items in the form which are selected.
// function calculateTotal(inputItem) {
//  with (inputItem.form) {
//    // Process each of the different input types in the form.
//    if (inputItem.type == "radio") {   // Process radio buttons.
//      // Subtract the previously selected radio button value from the total.
//      calculatedTotal.value = eval(calculatedTotal.value) - eval(previouslySelectedRadioButton.value);
//      // Save the current radio selection value.
//      previouslySelectedRadioButton.value = eval(inputItem.value);
//      // Add the current radio button selection value to the total.
//      calculatedTotal.value = eval(calculatedTotal.value) + eval(inputItem.value);
//    } else {   // Process check boxes.
//      if (inputItem.checked == false) {   // Item was uncheck. Subtract item value from total.
//          calculatedTotal.value = eval(calculatedTotal.value) - eval(inputItem.value);
//      } else {   // Item was checked. Add the item value to the total.
//          calculatedTotal.value = eval(calculatedTotal.value) + eval(inputItem.value);
//      }
//    }
// 
//    // Total value should never be less than 0.
//    if (calculatedTotal.value < 0) {
//      InitForm();
//    }
//    
//     // Return total value.
//    return(formatCurrency(calculatedTotal.value));
//  }
// }

function isAlien(a) {
   return isObject(a) && typeof a.constructor != 'function';
}
function isArray(a) {
    return isObject(a) && a.constructor == Array;
}
function isBoolean(a) {
    return typeof a == 'boolean';
}
function isEmpty(o) {
    var i, v;
    if (isObject(o)) {
        for (i in o) {
            v = o[i];
            if (isUndefined(v) && isFunction(v)) {
                return false;
            }
        }
    }
    return true;
}
function isFunction(a) {
    return typeof a == 'function';
}
function isNull(a) {
    return typeof a == 'object' && !a;
}
function isNumber(a) {
    return typeof a == 'number' && isFinite(a);
}
function isObject(a) {
    return (a && typeof a == 'object') || isFunction(a);
}
function isString(a) {
    return typeof a == 'string';
}
function isUndefined(a) {
    return typeof a == 'undefined';
} 

// Calculate the total for items in the form which are selected.
function calculateTotal(inputItem) {
  with (inputItem.form) {
    // Process each of the different input types in the form.
    if (inputItem.type == "radio") {   // Process radio buttons.
      // Add the current radio button selection value to the total.
        if(isNaN(inputItem.value)) {
                calculatedTotal.value = eval(calculatedTotal.value) + 0;
        } else {
     
                calculatedTotal.value = eval(calculatedTotal.value) + eval(inputItem.value);
        }
    } 

    // Total value should never be less than 0.
    if (calculatedTotal.value < 0){
       InitForm();
    }

  if (document.getElementById("amount50").checked) 
  	{ calculatedTotal.value = 50;} 
  else if (document.getElementById("amount75").checked) 
  	{ calculatedTotal.value = 75;} 
  else if (document.getElementById("amount100").checked) 
  	{ calculatedTotal.value = 100;}  
  else { calculatedTotal.value = 0;}

    
    // Return total value.
    return(formatCurrency(calculatedTotal.value));
  }
}

// Format a value as currency.
function formatCurrency(num) {
  num = num.toString().replace(/\€|\,/g,'');
  if(isNaN(num))
     num = "0";
  sign = (num == (num = Math.abs(num)));
  num = Math.floor(num*100+0.50000000001);
  cents = num%100;
  num = Math.floor(num/100).toString();
  if(cents<10)
      cents = "0" + cents;
  for (var i = 0; i < Math.floor((num.length-(1+i))/3); i++)
      num = num.substring(0,num.length-(4*i+3)) + ',' + num.substring(num.length-(4*i+3));
   return (((sign)?'':'-') + num + '.' + cents); //Removed Euro Sign
  // return (((sign)?'':'-') + '€' + num + '.' + cents);
}

// This function initialzes all the form elements to default values.
function InitForm() {
  // Reset values on form.
  document.selectionForm.Total.value='0';
  document.selectionForm.calculatedTotal.value=0;
  document.selectionForm.previouslySelectedRadioButton.value=0;

  // Set all checkboxes and radio buttons on form to unchecked.
  for (i=0; i < document.selectionForm.elements.length; i++) {
    if (document.selectionForm.elements[i].type == 'checkbox' | document.selectionForm.elements[i].type == 'radio') {
      document.selectionForm.elements[i].checked = false;
    }
  }
}

//---------------------------------------------------------------------||
// FUNCTION:    CKquantity                                             ||
// PARAMETERS:  Quantity to                                            ||
// RETURNS:     Quantity as a number, and possible alert               ||
// PURPOSE:     Make sure quantity is represented as a number          ||
//---------------------------------------------------------------------||
function CKquantity(checkString) {
   var strNewQuantity = "";

   for ( i = 0; i < checkString.length; i++ ) {
      ch = checkString.substring(i, i+1);
      if ( (ch >= "0" && ch <= "9") || (ch == '.') )
         strNewQuantity += ch;
   }

   if ( strNewQuantity.length < 1 )
      strNewQuantity = "1";

   return(strNewQuantity);
}