[Javascript] Some function for Cookie access on Nokia Widget Engine (WRT)

/********************************************************************************* * * Description : Some function for Cookie access * Copyright : Copyright(c) 2009 * * @author Moky * @version 1.0 2009-05-05 * *********************************************************************************//**Usage:<mce:script language="javascript" src="js/lib/cookie.js" mce_src="js/lib/cookie.js"></mce:script>... */function setPreference(name, value) {try {window.widget.setPreferenceForKey(value, name);} catch(e) {}}function getPreference(name) {var value = null;try {value = window.widget.preferenceForKey('cdkey');if (value == 'undefined') {value = null;}} catch(e) {}return value;}function setCookie(name, value) {document.cookie = name + '=' + escape(value);// save into nokia widget enginesetPreference(name, value);}function getCookie(name) {// get from nokia widget enginevar value = getPreference(name);if (value != null) return value;var arr = document.cookie.match(new RegExp('(^| )' + name + '=([^;]*)(;|$)'));if (arr != null) {return unescape(arr[2]);}return null;}function delCookie(name) {var exp = new Date();exp.setTime(exp.getTime() - 1);var cval = getCookie(name);if (cval != null) document.cookie = name + '=null;expires=' + exp.toGMTString();// delete from nokia widget enginesetPreference(name, null);}