var user_changes = false;

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

function isUnsignedInteger(s) {
	return (s.toString().search(/^[0-9]+$/) == 0);
}

function CreateBookmarkLink() {
var title = document.title;
var url = document.location.href;

	if (window.sidebar.addPanel) { // Mozilla Firefox Bookmark
		window.sidebar.addPanel(title, url,"");
	} else if( window.external ) { // IE Favorite
		window.external.AddFavorite( url, title); }
	else if(window.opera && window.print) { // Opera Hotlist
		return true; }
}


function check_quick_search(form)
{
  // Check to see if we have a keywords option on this page
  can_search = false;
  if (form.filter_product_keywords) {
  	 // Check for criteria
	 if (form.filter_product_keywords.value.trim() != '' && form.filter_product_keywords.value.trim() != 'Keyword Search...' &&
         form.filter_product_keywords.value.trim() != 'Enter your search keywords here...' &&
         form.filter_product_keywords.value.trim() != 'Your Search Terms...') {
	 	can_search = true;
	 }
  }
  if (form.filter_product_brand_id) {
  	 // Check for criteria
	 if (form.filter_product_brand_id.value.trim() != '') {
	 	can_search = true;
	 }
  }

  if(can_search == false) {
	  alert('Please enter one or more search criteria');
	  return false;
  }
  return true;
}

function quick_order_add(form) {
	var error = 0;
	var error_message = "PLEASE REVIEW AND COMPLETE THE FOLLOWING\n\n";

	if(form.product_primary_code.value.trim() == '') {
		error_message = error_message + "* Product Code\n";
		error = 1;
	}
	if(form.qo_product_quantity.value.trim() == '') {
		error_message = error_message + "* Quantity\n";
		error = 1;
	}
	if (error == 1) {
		alert(error_message);
		return false;
	} else {
		return true;
	}
}

//-----------------------------------------------------------------------------------------
// The following functions provide some high-level functions which are used to clear and
// update the smart filters which are used within the system. Using this approach will save
// loads of time writting functions which can be used clear down the syetem functions
//-----------------------------------------------------------------------------------------
function clear_smart_filter(form)
{
	// Loop through all of the elements on the form
	for (var i = 0; i < form.elements.length; i++) {
		// Check for text boxes
		if (form.elements[i].type == "text") {
			// Just clear down the value property of the text field
			form.elements[i].value = "";
		}
		if (form.elements[i].type == "hidden") {
			// Just clear down the value property of the text field
			form.elements[i].value = "";
		}
		if (form.elements[i].type == "select-one") {
			// Just clear down the value property of the text field
			form.elements[i].value = "";
		}
		if (form.elements[i].type == "checkbox") {
			// Make sure the check box is selected
			form.elements[i].checked = false;
		}
	}
	// Now we have cleared all of the elements we can remove the filter by
	// submitting the form to the server
	form.submit();
}

function select_row_count(form, prefix)
{
	// Reserve the page with the correct options, default to page 1
	document.location.href= form.action + '/' + prefix + 'page/1/' + prefix + 'rows/' + form.datagrid_row_count.value;
}


// This function is to be used when a login form can't be genereated by the HTML helper
function generic_customer_login_validation(form) {
	var error = 0;
	var error_message = "PLEASE REVIEW AND COMPLETE THE FOLLOWING\n\n";

	if(form.customer_email_address.value.trim() == '' || form.customer_email_address.value == 'Email address...' || form.customer_email_address.value == 'Email / Login Name') {
		error_message = error_message + "* Email Address\n";
		error = 1;
	}
	if(form.customer_password.value.trim() == '') {
		error_message = error_message + "* Password\n";
		error = 1;
	}
	if (error == 1) {
		alert(error_message);
		return false;
	} else {
		return true;
	}
}

// This function is to be used when a login form can't be genereated by the HTML helper
function generic_customer_subscribe(form) {
	var error = 0;
	var error_message = "PLEASE REVIEW AND COMPLETE THE FOLLOWING\n\n";

	if(form.customer_email_address.value.trim() == '' || form.customer_email_address.value == 'Email address...') {
		error_message = error_message + "* Email Address\n";
		error = 1;
	}
	if (error == 1) {
		alert(error_message);
		return false;
	} else {
		return true;
	}
}


function refine_orderpad(form, eprocurement_contract_id, product_classification_system_structure_id) {
	// If the user has edited product quantities on the order pad then check to see if they would
	// like to update the contents of their shopping basket
	if (user_changes == true) {
		var update_basket = confirm('Would you like to add the products you\'ve amended to your basket?');
	} else {
		var update_basket = false;
	}

	// The user might have selected not to update the basket and if they do we need to set the action to something that
	// will stop that happening in the controller
	if (update_basket == false) {
		form.action_type.value = 'refine';
	} else {
		form.action_type.value = 'add_to_cart_refine';
	}

	// Set the URL because we're going to send the funnction back to the ordepad generation
	form.action = '/contracts/orderpad';

	// Re-write the form action to drill down - the default action is to add to basket and show the basket screen afterwards
	form.eprocurement_contract_id.value = eprocurement_contract_id;
	form.category.value = product_classification_system_structure_id;
	form.submit();
}

// When a user switches the view on an orderpad, this function checks to see if
// the user has made an updates and questions the user if they would like to
// add the products they have added quantities for to their basket.
function switch_view( link, form )
{

	// If the user has edited product quantities on the order pad then check to see if they would
	// like to update the contents of their shopping basket
	if (user_changes == true) {

	    // If they've made changes then don't follow the link.
	    follow_link = false;
		update_basket = confirm('Would you like to add the products you\'ve amended to your basket?');

	} else {

	    // If they haven't then we're free to follow the link.
		follow_link = true;
		update_basket = false;

	}

	// If they want the basket updated, then submit the form.
	if ( update_basket ) {

	    form.action_type.value = 'add_to_cart';
	    form.action = link.href;
	    form.submit( );

	}

	return follow_link;
}

//-----------------------------------------------------------------------------------------
// These functions are used to provide select all and select none functionality to the
// forms within the system, the buttons on the form will need to be linked up to these
// controls within the appropriate form name selected
//-----------------------------------------------------------------------------------------

//This function will allow the user to select all checkboxed on the given form
function select_all(form, css_prefix)
{
	// Loop through all of the form elements
	for (var i = 0; i < form.elements.length; i++) {
		// check to see what type if control this is
		// Check to see if this is a check box
		if (form.elements[i].type == "checkbox") {
			// Make sure the check box is selected
			form.elements[i].checked = true;
			// Make sure the datagrid persistance object is updated
			datagrid_checkbox_clicked(form.elements[i], css_prefix);
		}
	}
}

function select_none(form, css_prefix)
{
	// Loop through all of the form elements
	for (var i = 0; i < form.elements.length; i++) {
		// check to see what type if control this is
		if (form.elements[i].type == "checkbox") {
			// Make sure the check box is not selected
			form.elements[i].checked = false;
			// Make sure the datagrid persistance object is updated
			datagrid_checkbox_clicked(form.elements[i], css_prefix);
		}
	}
}

function select_row_count(form, prefix)
{

    rows_selector = document.getElementById( prefix + 'rows' );
    value = 0;

    if ( rows_selector != null ) {

        value = rows_selector.value;

    } else {

        value = form.datagrid_row_count.value;

    }

	// Reserve the page with the correct options, default to page 1
	document.location.href= form.action + '/' + prefix + 'page/1/' + prefix + 'rows/' + value;
}


function batch_update(form)
{
	// We need to create a list of the database ID's used
	id_list = "";
	cookie_value = get_cookie('datagrid_checkbox_options');
	checkbox_array = cookie_value.split('.');
	for (var n=0; n < checkbox_array.length; n++) {
		// Check to see if the item is in the list
		if (id_list != "") id_list += ",";
		id_list += checkbox_array[n];
	}

	// Check to make sure the user has selected an option
	if (id_list.trim() == "") {
		// The user has not selected anything from the list
		alert('Please select the records you require using the checkboxes provided');
	} else {
	    // check to see what the update is and get the user to confirm accordingly
		confirmation_message = 'Batch update type not known';
		if (form.datagrid_row_batch_update.value == 'restriction_list_batch_link_product')
		    confirmation_message = 'Link the selected products?\n\nYou have selected records: ' + id_list;

// Check to see if there is a modal dialog we need to hide
		if (document.getElementById('vstall_dialog_container')) {
			vstall_dialog_hide(false);
		}

		// Get the user to confirm the command
		if (confirm(confirmation_message)) {
				// We can post the form for the batch update
				form.submit();
		}
	}
}

//-----------------------------------------------------------------------------------------
// The following functions are used to automatically provide persistance on datagrid control
// as the user navigates through pages of information this will save passing the information
// to the server as part of a post of get command. A much neater solution!
//-----------------------------------------------------------------------------------------
function datagrid_checkbox_clicked(checkbox, css_prefix)
{
	// The user has amended the status of the checkbox which is used within the system
	// we need to store the check the current status of the cookie by loading it and
	// converting it to an array we can then check the values
	cookie_value = get_cookie('datagrid_checkbox_options');
	checkbox_array = cookie_value.split('.');

	// Check to see if the user has checked the item or not?
	if (checkbox.checked) {
		// We need to check to make sure the cookie is not already present within the system
		found = false;
		for (var n=0; n < checkbox_array.length; n++) {
			// Check to see if the item is in the list
			if (checkbox_array[n] == checkbox.value) found = true;
		}
		// If we have got to this point then we need to make sure the ID of the checkbox
		// is stored within the cookie ready to be sent to the server
		if (found == false) {
			if (cookie_value.trim() != '') cookie_value = cookie_value + '.';
			cookie_value = cookie_value + checkbox.value;
		}
	} else {
		// We need to loop through the values to ensure the checkbox is
		cookie_value = "";
		for (var n=0; n < checkbox_array.length; n++) {
			// Check to see if the item is in the list
			if (checkbox_array[n] != checkbox.value) {
				// Its safe to add this item to the cookie list
				if (cookie_value.trim() != '') cookie_value = cookie_value + '.';
				cookie_value = cookie_value + checkbox_array[n];
			}
		}
	}

	// We need to get hold of the parent row and set the style accordingly
	row = checkbox.parentNode.parentNode;
	if (row) {
		// We need to set the class name of the item
		if (checkbox.checked) {
			row.className = css_prefix + '_row_selected';
		} else {
			// Check to see if we can find our attribute
			attribute = row.getAttribute('originalclass');
			if (attribute) {
				// restore the original class
				row.className = attribute;
			} else {
				// default to odd
				row.className = css_prefix + '_row_odd';
			}
		}
	}

	// If we have got to this point we need to write out the cookie to the browser
	// make sure we have some cross session compatibility
	cookie_string = escape('datagrid_checkbox_options') + '=' + escape(cookie_value) + ';path=/;';
	document.cookie = cookie_string;
}

//-----------------------------------------------------------------------------------------

// This function will load the value for the specified cookie, if the cookie is not present
// within the browser then an empty string will be returned to the calling function
function get_cookie(cookie_name)
{
	// Initialise the value we will return
	var cookie_value = '';
	// Try and locate the position of our cookie
	var posName = document.cookie.indexOf(escape(cookie_name) + '=');
	// Is the cookie name present?
	if (posName != -1) {
		// Get hold of the position of the cookie value
		var posValue = posName + (escape(cookie_name) + '=').length;
		// Find the end of the value using the delimiter
		var endPos = document.cookie.indexOf(';', posValue);
		// Extract the value of the cookie
		if (endPos != -1) cookie_value = unescape(document.cookie.substring(posValue, endPos));
		else cookie_value = unescape(document.cookie.substring(posValue));
	}

	// Return the extracted value or default value to calling function
	return (cookie_value);
};
//-----------------------------------------------------------------------------------------

// Provides help information and what CV2 digits are and where they can be found
function cv2_help() {
	var newwindow = window.open('/checkout/show_cv2_info','name','height=231,width=410,left=100,top=100,resizable=no,scrollbars=no,toolbar=no,status=no');
}
//-----------------------------------------------------------------------------------------

function update_and_checkout(form) {
	form.action.value = "update_basket_checkout";
	form.submit();
}

/**
 * Changes the class of the parent element for the selected radio button and
 * sets all the other possible value's parent to unselected
 **/
function toggle_selection( form, element ) {

    radios = form.getElements( 'input[name=' + element + ']' );

    radios.each( function( el ) {

        radio_parent = el.getParent( );

		if ( el.checked ) {

			radio_parent.removeClass( 'unselected_item' );
			radio_parent.addClass( 'selected_item' );

		} else {

			radio_parent.addClass( 'unselected_item' );
			radio_parent.removeClass( 'selected_item' );

		}

    });

}

function check_checkout_delivery(form) {
	if (form.customer_address_book_id.value != -1) {
		var address_selected = false;

		if (form.customer_address_book_id.length == undefined) {
			address_selected = form.customer_address_book_id.checked;
		} else {
			for (var i=0; i<form.customer_address_book_id.length;i++) {
				if (form.customer_address_book_id[i].checked) {
					address_selected = true;
					break;
				}
			}
		}

		if (address_selected == false) {
			alert('Please select your delivery address');
			return false;
		}
	} else {
		var error_message = "PLEASE REVIEW AND COMPLETE THE FOLLOWING" + "\n\n";
		var error         = 0;

		if (form.customer_address_book_name.value.trim() == '') {
			error_message = error_message + "* Addressee name" + "\n";
			error = 1;
		}
		if (form.customer_address_book_address_line_1.value.trim() == '') {
			error_message = error_message + "* Property number" + "\n";
			error = 1;
		}
		if (form.customer_address_book_city.value.trim() == '') {
			error_message = error_message + "* City" + "\n";
			error = 1;
		}
		if (form.customer_address_book_postcode.value.trim() == '') {
			error_message = error_message + "* Postcode" + "\n";
			error = 1;
		}
		if (form.system_countries_id.value.trim() == '') {
			error_message = error_message + "* Country" + "\n";
			error = 1;
		}
		if (form.customer_address_book_telephone.value.trim() == '') {
			error_message = error_message + "* Telephone" + "\n";
			error = 1;
		}

		if (error == 1) {
			alert(error_message);
			return false;
		}
	}
}

function toggle_checkout_delivery_rate_selection(form) {
	form.action = '/checkout/confirm';
	form.submit();
}
function check_checkout_confirmation(form) {
	if (form.delivery_rate_id.value != -1) {
		var rate_selected = false;

		if (form.delivery_rate_id.length == undefined) {
			rate_selected = form.delivery_rate_id.checked;
		} else {
			for (var i=0; i<form.delivery_rate_id.length;i++) {
				if (form.delivery_rate_id[i].checked) {
					rate_selected = true;
					break;
				}
			}
		}

		if (rate_selected == false) {
			alert('Please select a delivery rate');
			return false;
		}
	}
}


// Moves selections from one multiple select to another
function move_to_list( source, dest ) {

    // Convert to mootools elements
    source = $( source );
    dest = $( dest );

	if ( source.selectedIndex != -1 ) {

	    // Check to see if there is a filler option in there. If there is,
	    // remove it
	    for ( loop = 0; loop < dest.options.length; loop++ ) {

	        option = $( dest.options[loop] );

	        if ( ( option.getValue( ) == 'none' ) ||
	             ( option.getText( ) == ' ' ) ) {

                option.remove( );

            }

	    }

	    // Now there are options, enable the control
	    dest.removeProperty( 'disabled' );

	    // Add it to the list
		for (i=0;i<source.options.length;i++) {
			if (source.options[i].selected) {
				dest.options[dest.options.length] = new Option(source.options[i].text, source.options[i].value);
			}
		}
		// Remove it from the source
		for (i=source.options.length-1;i>=0;i--) {
			if (source.options[i].selected) {
				source.options[i] = null;
			}
		}

		// Check if the source control is now empty. If it is then it should be
		// disabled
		if ( source.options.length == 0 ) {

		    // Disable the source
		    source.setProperty( 'disabled', 'disabled' );

		    // Create option
		    filler = new Element( 'option', {
		                          value : 'none'
		    });
		    filler.setText( ' ' );

		    // Add to the source
		    filler.injectInside( source );

		}

	}
}

function check_edit_department_form(form) {
	var selected = "";
	var result   = check_department_details(form);

	if (result == true) {
		for (i=form.users_selected.options.length-1;i>=0;i--) {
			if (selected != "") {
				selected += ",";
			}
			selected += form.users_selected.options[i].value;
		}
		form.selected_user_values.value = selected;
	}
	return result;
}

function check_cost_centre_form(form) {
	var selected = "";
	var result   = check_cost_centre_details(form);

	if (result == true) {
		for (i=form.users_selected.options.length-1;i>=0;i--) {
			if (selected != "") {
				selected += ",";
			}
			selected += form.users_selected.options[i].value;
		}
		form.selected_user_values.value = selected;
	}
	return result;
}

function check_restriction_list_form(form) {
	var selected = "";
	var result   = check_restriction_list_details(form);

	if (result == true) {
		for (i=form.users_selected.options.length-1;i>=0;i--) {
			if (selected != "") {
				selected += ",";
			}
			selected += form.users_selected.options[i].value;
		}
		form.selected_user_values.value = selected;
	}
	return result;
}

function check_user_details_form(form) {

	var selected = "";
	for (i=form.departments_selected.options.length-1;i>=0;i--) {
		if (selected != "") {
			selected += ",";
		}
		selected += form.departments_selected.options[i].value;
	}
	form.departments_selected_values.value = selected;

	var selected = "";
	for (i=form.cost_centres_selected.options.length-1;i>=0;i--) {
		if (selected != "") {
			selected += ",";
		}
		selected += form.cost_centres_selected.options[i].value;
	}
	form.cost_centres_selected_values.value = selected;

	var selected = "";
	for (i=form.delivery_addresses_selected.options.length-1;i>=0;i--) {
		if (selected != "") {
			selected += ",";
		}
		selected += form.delivery_addresses_selected.options[i].value;
	}
	form.delivery_address_selected_values.value = selected;

	var selected = "";
	for (i=form.contracts_selected.options.length-1;i>=0;i--) {
		if (selected != "") {
			selected += ",";
		}
		selected += form.contracts_selected.options[i].value;
	}
	form.contracts_selected_values.value = selected;

	var selected = "";
	for (i=form.product_catalogues_selected.options.length-1;i>=0;i--) {
		if (selected != "") {
			selected += ",";
		}
		selected += form.product_catalogues_selected.options[i].value;
	}
	form.product_catalogues_selected_values.value = selected;

	var selected = "";
	for (i=form.restriction_lists_selected.options.length-1;i>=0;i--) {
		if (selected != "") {
			selected += ",";
		}
		selected += form.restriction_lists_selected.options[i].value;
	}
	form.restriction_lists_selected_values.value = selected;

	var selected = "";
	var result   = check_account_user_details(form);

	return result;
}


// Takes the source element and checks to see if we need to enable or disable
// the associated action drop down.
function checkActions( source, action_id, required_if_enabled ) {

    validation = document.getElementById( action_id );

    if ( ( source.value != '0' ) &&
       ( source.value != '' ) ) {

        validation.disabled = false;

        if ( required_if_enabled == true ) {

            validation.className = 'inputfield_required';

        }

    } else {

        validation.disabled = true;

        if ( validation.options ) {

            validation.options[0].selected = true;

        } else {

            validation.value = '0';

        }

        validation.className = 'inputfield'

    }

}

function close_dialog_and_reload( ) {

    dialog = $( 'dialog' );
    dialog.setStyle( 'background-image', 'none' );
    dialog.setHTML( '<h2>Your information has now been saved!</h2>' );

    if ( window.successful_dialog ) {

        successful_dialog( );

    }

    setTimeout( vstall_dialog_hide, 1000 );

}

function validate_favourites(form)
{
	var error = 0;
	var error_message = "PLEASE REVIEW AND COMPLETE THE FOLLOWING\n\n";

	if(form.customer_favourite_products_folder_id.value.trim() == '' &&
	   form.customer_favourite_products_new_folder_name.value.trim() == '') {
		error_message = error_message + "* Please select a previous or create a new favourites folder\n";
		error = 1;
	}
	if (error == 1) {
		alert(error_message);
		return false;
	} else {
		return true;
	}

}

function submit_form( form ) {

    // Change this to call a function that will reload the parent page and hide the dialog
    form = $( form );
    form.send( { onComplete: parent.close_dialog_and_reload } );
    form.setStyle( 'display', 'none' );

    processing = new Element( 'h2', { 'id' : 'processing' });
    processing.setHTML( '<img src="/images/loading.gif" alt="Processing" /> Please wait while we save your information...' );
    processing.injectAfter( form );

}


function mini_quick_order_add(form) {
	var error = 0;
	var error_message = "PLEASE REVIEW AND COMPLETE THE FOLLOWING\n\n";

	if(form.qo_product_primary_code.value.trim() == '') {
		error_message = error_message + "* Product Code\n";
		error = 1;
	}
	if (error == 1) {
		alert(error_message);
		return false;
	} else {
		return true;
	}
}

/**
 * This function mades an AJAX call to vstall to add a product to a restriction
 * list. It assumes that vstall is going to return the complete data grid for
 * this back to it can replace the current one with it.
 *
 **/
function restriction_add_product( eprocurement_account_restriction_list_id, product_id ) {

    add_product = new Ajax( '/account/restriction_list_product_add/' +
                            eprocurement_account_restriction_list_id + '/' +
                            product_id,
                            { method: 'get',
                              onComplete: vstall_dialog_hide,
                              update: $( 'content' ) } );
    add_product.request( );

}

/**
 * Replaces the background image of an element with one run through a Microsoft
 * proprietary filter to make transparancy work in IE6
 **/
function fix_ie6_background_png_transparancy( element )
{

    bgImage = element.getStyle( 'background-image' );
    bgImage = bgImage.substring( 5, bgImage.length - 2 );

    if ( bgImage.substring( bgImage.length - 3 ).toUpperCase( ) == 'PNG' )
    {

        element.setStyles( {
            background: 'none',
            filter: 'progid:DXImageTransform.Microsoft.AlphaImageLoader(src=\'' + bgImage + '\', sizingMethod=\'crop\');'
        });

    }

}