function(url) {
		var query = getQueryString(url);
		for (var name in query) {
			if (query[name] === '?') {
				return name;
			}
		}
		return null;
	}
function(url) {
		var query = getQueryString(url);
		for (var name in query) {
			if (query[name] === '?') {
				return name;
			}
		}
		return null;
	}
function ( url ) { var query = getQueryString ( url ) ; for ( var name in query ) { if ( query [ name ] === '?' ) { return name ; } } return null ; }
获取将传递给服务器的回调函数的请求参数名
获取将传递给服务器的回调函数的请求参数名
Get the name of the query string from the given URL