var cur_theme_index = 0;
var wInternal;
var themes = new Array();


function createThemeLinks() {
	for (var i = 0; i < themes.length; i++) {
		jQuery('#navigator').append('<a href="javascript:void(0);" title="' + themes[i][2] + '" onclick="changeTheme(' + i + ', true);"><!-- leer --></a>');
	}
}


function beginWalkingThemes() {
	clearInterval(wInternal);
	wInternal = setInterval("walkThemes()", 7500);
}


function walkThemes() {
	cur_theme_index++;

	if (cur_theme_index == themes.length) {
		cur_theme_index = 0;
	}

	changeTheme(cur_theme_index, false);
}


function changeTheme(index, stop_walking) {
	jQuery('#teaser p').html(themes[index][2]);
	jQuery('#teaser a').attr('href', themes[index][0]);
	jQuery('#themeimage').attr('src', themes[index][1]);

	jQuery('#navigator a').each(function (i) {
		if (i == index) {
			jQuery(this).addClass('current');
		} else {
			jQuery(this).removeClass('current');
		}
	});

	cur_theme_index = index;

	document.cookie = "cur_theme_index=" + cur_theme_index + ";path=/;";

	if (stop_walking) {
		clearInterval(wInternal);
		setTimeout("beginWalkingThemes()", 13000);
	}
}


function preloadThemeImages() {
	for (var i = 0; i < themes.length; i++) {
		jQuery("<img>").attr("src", themes[i][1]);
	}
}


function resizeThemeImage() {
	var new_width = jQuery(window).width();

	if (new_width > 1280)
		new_width = 1280;

	if (new_width < 1024)
		new_width = 1024;

	jQuery('#themes').css('width', new_width);
}


function getCookieValue(check_name) {
	var a_all_cookies = document.cookie.split( ';' );
	var a_temp_cookie = '';
	var cookie_name = '';
	var cookie_value = '';
	var b_cookie_found = false; // set boolean t/f default f

	for (i = 0; i < a_all_cookies.length; i++) {
		// now we'll split apart each name=value pair
		a_temp_cookie = a_all_cookies[i].split( '=' );

		// and trim left/right whitespace while we're at it
		cookie_name = a_temp_cookie[0].replace(/^\s+|\s+$/g, '');

		// if the extracted name matches passed check_name
		if (cookie_name == check_name) {
			b_cookie_found = true;
			// we need to handle case where cookie has no value but exists (no = sign, that is):
			if (a_temp_cookie.length > 1) {
				cookie_value = unescape( a_temp_cookie[1].replace(/^\s+|\s+$/g, '') );
			}
			// note that in cases where cookie is initialized but no value, null is returned
			return cookie_value;
			break;
		}
		a_temp_cookie = null;
		cookie_name = '';
	}

	if (!b_cookie_found) {
		return null;
	}
}