function parse_url (str, component) {
	// http://kevin.vanzonneveld.net
	// +	  original by: Steven Levithan (http://blog.stevenlevithan.com)
	// + reimplemented by: Brett Zamir (http://brett-zamir.me)
	// %		  note: Based on http://stevenlevithan.com/demo/parseuri/js/assets/parseuri.js
	// %		  note: blog post at http://blog.stevenlevithan.com/archives/parseuri
	// %		  note: demo at http://stevenlevithan.com/demo/parseuri/js/assets/parseuri.js
	// %		  note: Does not replace invaild characters with '_' as in PHP, nor does it return false with
	// %		  note: a seriously malformed URL.
	// %		  note: Besides function name, is the same as parseUri besides the commented out portion
	// %		  note: and the additional section following, as well as our allowing an extra slash after
	// %		  note: the scheme/protocol (to allow file:/// as in PHP)
	// *	 example 1: parse_url('http://username:password@hostname/path?arg=value#anchor');
	// *	 returns 1: {scheme: 'http', host: 'hostname', user: 'username', pass: 'password', path: '/path', query: 'arg=value', fragment: 'anchor'}

	var  o   = {
		strictMode: false,
		key: ["source","protocol","authority","userInfo","user","password","host","port","relative","path","directory","file","query","anchor"],
		q:   {
			name:   "queryKey",
			parser: /(?:^|&)([^&=]*)=?([^&]*)/g
		},
		parser: {
			strict: /^(?:([^:\/?#]+):)?(?:\/\/((?:(([^:@]*):?([^:@]*))?@)?([^:\/?#]*)(?::(\d*))?))?((((?:[^?#\/]*\/)*)([^?#]*))(?:\?([^#]*))?(?:#(.*))?)/,
			loose:  /^(?:(?![^:@]+:[^:@\/]*@)([^:\/?#.]+):)?(?:\/\/\/?)?((?:(([^:@]*):?([^:@]*))?@)?([^:\/?#]*)(?::(\d*))?)(((\/(?:[^?#](?![^?#\/]*\.[^?#\/.]+(?:[?#]|$)))*\/?)?([^?#\/]*))(?:\?([^#]*))?(?:#(.*))?)/ // Added one optional slash to post-protocol to catch file:/// (should restrict this)
		}
	};

	var m   = o.parser[o.strictMode ? "strict" : "loose"].exec(str),
	uri = {},
	i   = 14;
	while (i--) {uri[o.key[i]] = m[i] || "";}


	// Uncomment the following to use the original more detailed (non-PHP) script
	/*
		uri[o.q.name] = {};
		uri[o.key[12]].replace(o.q.parser, function ($0, $1, $2) {
		if ($1) uri[o.q.name][$1] = $2;
		});
		return uri;
	*/




	switch (component) {
		case 'PHP_URL_SCHEME':
			return uri.protocol;
		case 'PHP_URL_HOST':
			return uri.host;
		case 'PHP_URL_PORT':
			return uri.port;
		case 'PHP_URL_USER':
			return uri.user;
		case 'PHP_URL_PASS':
			return uri.password;
		case 'PHP_URL_PATH':
			return uri.path;
		case 'PHP_URL_QUERY':
			return uri.query;
		case 'PHP_URL_FRAGMENT':
			return uri.anchor;
		default:
			var retArr = {};
			if (uri.protocol !== '') {retArr.scheme=uri.protocol;}
			if (uri.host !== '') {retArr.host=uri.host;}
			if (uri.port !== '') {retArr.port=uri.port;}
			if (uri.user !== '') {retArr.user=uri.user;}
			if (uri.password !== '') {retArr.pass=uri.password;}
			if (uri.path !== '') {retArr.path=uri.path;}
			if (uri.query !== '') {retArr.query=uri.query;}
			if (uri.anchor !== '') {retArr.fragment=uri.anchor;}
			return retArr;
	}
}

function isset () {
	// http://kevin.vanzonneveld.net
	// +   original by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
	// +   improved by: FremyCompany
	// +   improved by: Onno Marsman
	// *	 example 1: isset( undefined, true);
	// *	 returns 1: false
	// *	 example 2: isset( 'Kevin van Zonneveld' );
	// *	 returns 2: true

	var a=arguments, l=a.length, i=0;

	if (l===0) {
		throw new Error('Empty isset'); 
	}

	while (i!==l) {
		if (typeof(a[i])=='undefined' || a[i]===null) { 
			return false; 
		} else { 
			i++; 
		}
	}
	return true;
}

function explode (delimiter, string, limit) {
	// http://kevin.vanzonneveld.net
	// +	 original by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
	// +	 improved by: kenneth
	// +	 improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
	// +	 improved by: d3x
	// +	 bugfixed by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
	// *	 example 1: explode(' ', 'Kevin van Zonneveld');
	// *	 returns 1: {0: 'Kevin', 1: 'van', 2: 'Zonneveld'}
	// *	 example 2: explode('=', 'a=bc=d', 2);
	// *	 returns 2: ['a', 'bc=d']
 
	var emptyArray = { 0: '' };

	// third argument is not required
	if ( arguments.length < 2 ||
		typeof arguments[0] == 'undefined' ||
		typeof arguments[1] == 'undefined' ) {
		return null;
	}
 
	if ( delimiter === '' ||
		delimiter === false ||
		delimiter === null ) {
		return false;
	}
 
	if ( typeof delimiter == 'function' ||
		typeof delimiter == 'object' ||
		typeof string == 'function' ||
		typeof string == 'object' ) {
		return emptyArray;
	}
 
	if ( delimiter === true ) {
		delimiter = '1';
	}

	if (!limit) {
		return string.toString().split(delimiter.toString());
	} else {
		// support for limit argument
		var splitted = string.toString().split(delimiter.toString());
		var partA = splitted.splice(0, limit - 1);
		var partB = splitted.join(delimiter.toString());
		partA.push(partB);
		return partA;
	}
}

function in_array (needle, haystack, argStrict) {
    // http://kevin.vanzonneveld.net
    // +   original by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +   improved by: vlado houba
    // +   input by: Billy
    // +   bugfixed by: Brett Zamir (http://brett-zamir.me)
    // *     example 1: in_array('van', ['Kevin', 'van', 'Zonneveld']);
    // *     returns 1: true
    // *     example 2: in_array('vlado', {0: 'Kevin', vlado: 'van', 1: 'Zonneveld'});
    // *     returns 2: false
    // *     example 3: in_array(1, ['1', '2', '3']);
    // *     returns 3: true
    // *     example 3: in_array(1, ['1', '2', '3'], false);
    // *     returns 3: true
    // *     example 4: in_array(1, ['1', '2', '3'], true);
    // *     returns 4: false

    var key = '', strict = !!argStrict;

    if (strict) {
        for (key in haystack) {
            if (haystack[key] === needle) {
                return true;
            }
        }
    } else {
        for (key in haystack) {
            if (haystack[key] == needle) {
                return true;
            }
        }
    }

    return false;
}