function abrir(URL) {

var width = 400;
var height = 300;

var left = 99;
var top = 99;

window.open(URL,'Fotos', 'width='+width+', height='+height+', top='+top+', left='+left+', scrollbars=yes, status=no, toolbar=no, location=no, directories=no, menubar=no, resizable=no, fullscreen=no');

}