Repeating fields Javascript

repeating_fields.js

// disable all fields in a template (so they do not get submitted)
$('.template').find('input, textarea, select, button').each(function()
{
	$(this).attr('disabled', 'disabled');
});

function doRepeat(replace)
{
	var container = $(this).closest('.container');

	var collection = $('> .collection', container);

	var template = $('> .template', collection);

	var clone = template.clone().removeClass('template');

	var pos = findPos($("[name*='[']", template).attr('name'), replace);

	var the_index = -1;

	$("[name*='[']", collection).each(function()
	{
		var the_name = $(this).attr('name');

		if (undefined != the_name && '' != the_name)
		{
			var parts = the_name.split('[');

			the_index = Math.max(the_index, ! isNaN(parseInt(parts[pos]))?parseInt(parts[pos]):-1);
		}
	});

	clone.find('input, textarea, select, button').each(function()
	{
		if ( ! $(this).parents('.template').length)
		{
			$(this).removeAttr('disabled');
		}

		var the_name = $(this).attr('name');

		if (undefined != the_name && '' != the_name)
		{
			var parts = the_name.split('[');

			parts[pos] = (the_index + 1) + ']';

			the_name = parts.join('[');

			$(this).attr('name', the_name);
		}
	});

	collection.append(clone);

	clone.show();
}

function findPos(n, c)
{
	var p = n.split('[');

	var pos;

	$.each(p, function(i, v)
	{
		pos = i;

		if (v.indexOf(c) > -1)
		{
			return false;
		}
	});

	return pos;
}

$('.qadd').live('click', function(e)
{
	e.preventDefault();

	doRepeat.call(this, '%');
});

$('.oadd').live('click', function(e)
{
	e.preventDefault();

	doRepeat.call(this, '@');
});