function CheckMandatoryFields() {
        var errorMsg ="";
        var fieldList = checkSubscriptionFields();  
	    if (fieldList != "") {
	        errorMsg = "The following information is needed to process your request:" + "\n" + fieldList;
	   	    alert(errorMsg);    
		    return false;
	    } else {
	        return true;
        }
	}
	 
    function checkSubscriptionFields(){
        // function to check if the required fields are empty or null.
        var fieldList = "";
        var fName = eval("document.getElementById('forename').value");
        var sName = eval("document.getElementById('surname').value");
        var sEmail = eval("document.getElementById('emailaddress').value");
        var sConfirmEmail = eval("document.getElementById('emailaddressconfirmation').value");
        var sPostcode = eval("document.getElementById('postcode').value");
        if (fName==""){
          fieldList +=" -- Forename\n";
        }
        if (sName==""){
          fieldList +=" -- Surname\n";
        }
        if (sEmail==""){
          fieldList +=" -- E-mail Address\n";
        }
        if (sConfirmEmail==""){
          fieldList +=" -- Confirm E-mail Address\n";
        }
        if (sPostcode==""){
          fieldList +=" -- ZIP/Postal Code\n";
        }    
        return fieldList;
    }

    function clearForm(oForm) {
        // function to clear the subscription fields.	    
  	    var elements = oForm.elements; 
	    oForm.reset();
	    for(i=0; i<elements.length; i++) {
		    field_type = elements[i].type.toLowerCase();
		    var name = elements[i].name;
		
		    // Do not clear the email data.
		    if(name == 'xwdf_emailAddress' || name == 'wdf_emailAddress') {
		        continue;
		    }
		    switch(field_type) {
			    case "text":  
			    case "textarea":
		        case "hidden":	
				    elements[i].value = ""; 
				    break;
			    default: 
				    break;
		    }
	    }
	}
	
	// object to hold the original content of subscriptionPopupBody
    var originalContent;
      
    function killPopup(o) {
        // o - Object to kill
        Popout.toggle('email_program_popout');
        // replace the body with the original.       
        document.getElementById('subscriptionPopupBody').innerHTML = originalContent;
    }

	var EmailProgram = {};
	EmailProgram.finalize = function() {
	    // function to process the subscription details.
	    var allFieldsPopulated = CheckMandatoryFields();
		if (allFieldsPopulated == true) {
            var url = "/" + "itd/amtrak/EmailSubscriptionConfirmation?";
  	        var params = '_subscriptionfirstname=' + $F('forename') + '&_subscriptionlastname=' + $F('surname')+ '&_subscriptionemail=' + $F('emailaddress') + '&_subscriptionconfirmemail=' + $F('emailaddressconfirmation')+ '&_subscriptionpostcode=' + $F('postcode');
   	    	var myAjax = new Ajax.Updater("subscriptionPopupBody", url, {method: 'get', parameters: params});
		}
	}
		   
	EmailProgram.initialize = function() {
        // function to process the initial subscription email.
        originalContent = document.getElementById('subscriptionPopupBody').innerHTML;
        if ($F('emailaddress') < 1) {
            errorMsg = "Please enter an email address to subscribe.";
            alert(errorMsg);
        } else {
            var url = "/" + "itd/amtrak/EmailSubscription?";
   	        var params = '_subscriptionemail=' + $F('emailaddress');
 		    var myAjax = new Ajax.Updater("subscriptionPopupBody", url, {method: 'get', parameters: params});

		    Popout.toggle('email_program_popout');
        }
    }