/*
**  jhistory 0.6 - jQuery plugin allowing simple non-intrusive browser history
**  author: Jim Palmer; released under MIT license
**    collage of ideas from Taku Sano, Mikage Sawatari, david bloom and Klaus Hartl
**  CONFIG -- place in your document.ready function two possible config settings:
**    $.history._cache = 'cache.html'; // REQUIRED - location to your cache response handler (static flat files prefered)
**    $.history.stack = {<old object>}; // OPTIONAL - prefill this with previously saved history stack (i.e. saved with session)
*/

(function($) {
	$(function () {
		// create the hidden iframe if not on the root window.document.body on-demand
		$("body").append('<iframe class="__historyFrame" src="'+$.history._cache +'" style="border:0px;width:0px;height:0px;visibility:hidden;" />');
		$.history.intervalId = $.history.intervalId || window.setInterval(function () {
				var cursor = $(".__historyFrame").contents().attr( $.browser.msie ? 'URL' : 'location' ).toString().split('#')[1];
				$('#__historyDebug').html('"' + $.history.cursor + '" vs "' + cursor + '" - ' + (new Date()).toString());
				if ( parseFloat($.history.cursor) >= 0 && parseFloat($.history.cursor) != ( parseFloat(cursor) || 0 ) ) {
					$.history.cursor = parseFloat(cursor) || 0;
					if ( typeof($.history.callback) == 'function' ) {
						$.history._locked = true;
						$.history.callback( $.history.stack[ cursor ], cursor );
						$.history._locked = false;
					}
				}
			}, 150);
	});
	$.history = function ( store ) {
		if (!$.history.stack) $.history.stack = {};
		if ($.history._locked) return false;
		$.history.cursor = (new Date()).getTime().toString();
		$.history.stack[ $.history.cursor ] = $.extend( true, {}, store );
		if ( $.browser.msie )
			$('.__historyFrame')[0].contentWindow.document.open().close();
		if ( $.browser.safari )
			$('.__historyFrame').contents()[0].location.href = $('.__historyFrame').contents()[0].location.href.split('?')[0] +
				'?' + $.history.cursor + '#' + $.history.cursor;
		else
			$('.__historyFrame').contents()[0].location.hash = '#' + $.history.cursor;
	}
})(jQuery);