function getParameter(url, name) {
    var urlparts = url.split('?');
    if (urlparts.length > 1) {
        var parameters = urlparts[1].split('&');
        for (var i = 0; i < parameters.length; i++) {
            var paramparts = parameters[i].split('=');
            if (paramparts.length > 1 && unescape(paramparts[0]) == name) {
                return unescape(paramparts[1]);
            }
        }
    }
    return null;
}



function parse_url (str, component) {  
	// Parse a URL and return its components    
	//   
	// version: 901.2514  
	// discuss at: http://phpjs.org/functions/parse_url  
	// +      original by: Steven Levithan (http://blog.stevenlevithan.com)  
	// + reimplemented by: Brett Zamir  
	// %          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;  
	}  
}