//Precarga de imágenes
var sp1 = new Image();
sp1.src = "../images/espana.gif";
var sp2 = new Image();
sp2.src = "../images/espana2.gif";

var uk1= new Image();
uk1.src = "../images/uk.gif";
var uk2 = new Image();
uk2.src = "../images/uk2.gif";

var gm1 = new Image();
gm1.src = "../images/german.gif";
var gm2 = new Image();
gm2.src = "../images/german2.gif";

var fr1 = new Image();
fr1.src = "../images/france.gif";
var fr2 = new Image();
fr2.src = "../images/france2.gif";

var sw1 = new Image();
sw1.src = "../images/sweden.gif";
var sw2 = new Image();
sw2.src = "../images/sweden2.gif";

var jp1 = new Image();
jp1.src = "../images/japan.gif";
var jp2 = new Image();
jp2.src = "../images/japan2.gif";

var ch1 = new Image();
ch1.src = "../images/china.gif";
var ch2 = new Image();
ch2.src = "../images/china2.gif";

var tw1 = new Image();
tw1.src = "../images/taiwan.gif";
var tw2 = new Image();
tw2.src = "../images/taiwan2.gif";

var kr1 = new Image();
kr1.src = "../images/koreas.gif";
var kr2 = new Image();
kr2.src = "../images/koreas2.gif";

var quienin1 = new Image();
quienin1.src = "../images/quienin.gif";
var quienin2 = new Image();
quienin2.src = "../images/quien2in.gif";

var consigin1 = new Image();
consigin1.src = "../images/consiin.gif";
var consigin2 = new Image();
consigin2.src = "../images/consi2in.gif";

var estibain1 = new Image();
estibain1.src = "../images/estibin.gif";
var estibain2 = new Image();
estibain2.src = "../images/estib2in.gif";

var transin1 = new Image();
transin1.src = "../images/transin.gif";
var transin2 = new Image();
transin2.src = "../images/trans2in.gif";

var otrosin1 = new Image();
otrosin1.src = "../images/otrosin.gif";
var otrosin2 = new Image();
otrosin2.src = "../images/otros2in.gif";

var contain1 = new Image();
contain1.src = "../images/contain.gif";
var contain2 = new Image();
contain2.src = "../images/conta2in.gif";