function imagens(valor){
	var imgPL = new Array("img_cba_1.jpg", "img_cba_2.jpg", "img_cba_3.jpg", "img_cba_4.jpg", "img_cba_5.jpg", "img_cba_6.jpg", "img_cba_7.jpg", "img_cba_8.jpg");
  		// randomiza os arrays
  	var n1 = Math.floor(Math.random()*imgPL.length);
  	var url_imgs = "http://www.brasilapicola.com.br/themes/cba/images/"+imgPL[n1];
  	
  	// adiciona as images
  	$("#block-block-1").css("background", "url("+url_imgs+") no-repeat");
  	
}

$(document).ready(function(){
		
  	
  	imagens();
  		
})