var imagenumbersss1 = 3; 
var randomnumbersss1 = Math.random(); 
var randons1 = Math.round( (imagenumbersss1-1) * randomnumbersss1); 

imagesss1 = new Array; 
imagesss1[0] = "azul/1.gif"; 
imagesss1[1] = "azul/2.gif"; 
imagesss1[2] = "azul/3.gif"; 

linksss1 = new Array; 
linksss1[0] = "http://www.ogc.cl"; 
linksss1[1] = "publica.html"; 
linksss1[2] = "publica.html"; 

var imagesss1 = imagesss1[randons1]; 
var linksss1 = linksss1[randons1];