jQuery Trim Serialize form function. Leaves previous form intact, allows for giving selector for trim to run on. Defaults to only input[type=text] inputs.

trimSerialize.jquery.js

(function($) {
	/**
	 * Trim Form Elements before returning Serialize()
	 * @param  {string}       selector Defaults to 'input[type=text]'
	 * @return {serialized()}          Returned jQuery serialize() string
	 */
	$.fn.trimSerialize = function(selector) {
		// Deep clone form (to get all nested elements), then unbind everything off the clone
		var clonedObject = $(this).clone(true).off();

		// Run over selector of each element, trim if matches found
		selector = (selector === undefined) ? 'input[type=text]' : selector;
		clonedObject.find(selector).each(function() {
			$(this).val( $.trim( $(this).val() ) );
		});

		// Serialize the cloned object.
		return clonedObject.serialize();
	};
})(jQuery);