$('#lasgalerias > div:gt(0)').hide();
	
	setInterval( function()	{
		$('#lasgalerias > div:first')
			.css( "display", "none")
			.next()
			.fadeIn('slow')
			.end()
			.appendTo('#lasgalerias');
	}, 3000);

<div id="lasgalerias">
	<div style="display:block;"><img src="http://www.buyinmejico.com/uploads/paisajes//001_medium.jpg" border="0"></div>
	<div style="display:none;"><img src="http://www.buyinmejico.com/uploads/paisajes//003_medium.jpg" border="0"></div>
	<div style="display:none;"><img src="http://www.buyinmejico.com/uploads/paisajes//009_medium.jpg" border="0"></div>
	<div style="display:none;"><img src="http://www.buyinmejico.com/uploads/paisajes//011_medium.jpg" border="0"></div>
</div>

<?php
	$url= 'http://miurl.com/bien/largaaaaaaaaa.html'; # url larga 
	$api_key='123456789asdasdsadasdasdasd'; # mi api
	$host= 'www.googleapis.com'; # servidor
	$port= '443'; # puerto ssl
	$path= '/urlshortener/v1/url?'; # path donde se hara el request POST
	$buf= array( "longUrl"=>urlencode($url) ); # array para pasar a json
	$data= array( 'POST', $path.$api_key, json_encode($buf) ); # pasando a json
 
	$r='';
 
	$http_request  = "$data[0] $data[1] HTTP/1.0\r\n";
	$http_request .= "Host: $host\r\n";
	$http_request .= "Content-Type: application/json;\r\n";
	$http_request .= "\r\n";
	$http_request .= $data[2];
 
	if( ($fs = @fsockopen($host, $port, $errno, $errstr, 10))==FALSE )
		echo 'No se puede abrir socket :: ['. $errno. '] '. $errstr;
	else
		{
		fwrite($fs, $http_request);
 
		while ( !feof($fs) )
			$r .= fgets($fs, 1160); // One TCP-IP packet
		fclose($fs);
		$r= explode("\r\n\r\n", $r, 2);
 
		# exito
		print_r($r);
		}
?>

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