$(document).ready(function() {
	var tipo = $("body").attr("id");
	if(tipo=="large"){
 		var randomImages = ['fondoOja.JPG'];
 		var rndNum = Math.ceil(Math.random() * randomImages.length) -1;
		$("body").css({ background: "no-repeat top center url(http://www.bogaris.com/system/modules/com.bogaris.contenidos/resources/img/"+randomImages[rndNum]+")" });
	}
	else{
 		var randomImages = ['fondoEn1.jpg','fondoPromocion.jpg','fondoRe1.jpg','retail3.jpg'];
 		var rndNum = Math.ceil(Math.random() * randomImages.length) -1;
		$("body").css({ background: "no-repeat top center url(http://www.bogaris.com/system/modules/com.bogaris.contenidos/resources/img/"+randomImages[rndNum]+")" });
	}
});