function makeSPARQLQuery( endpointUrl, sparqlQuery, doneCallback ) {
	var settings = {
		headers: { Accept: 'application/sparql-results+json' },
		data: { query: sparqlQuery }
	};
	return $.ajax( endpointUrl, settings ).then( doneCallback );
}

var endpointUrl = 'http://sparql.example/endpoint',
	sparqlQuery = "# cats\n" +
        "SELECT ?cat ?catLabel WHERE {\n" +
        "  ?cat wdt:P31 wd:Q146.\n" +
        "  SERVICE wikibase:label { bd:serviceParam wikibase:language \"[AUTO_LANGUAGE],en\". }\n" +
        "}\n" +
        "";

makeSPARQLQuery( endpointUrl, sparqlQuery, function( data ) {
		$( 'body' ).append( $( '<pre>' ).text( JSON.stringify( data ) ) );
		console.log( data );
	}
);