<!-- 
function VecImagenes() 
{ 
n=0; 
this[n++]="my_images2/load1.jpg"; 
this[n++]="my_images2/load2.jpg"
this.N=n; 
} 
var Imagenes=new VecImagenes(); 
src= Imagenes[ Math.floor(Math.random() * Imagenes.N) ] ; 
document.write("<IMG SRC="+src+">"); 
//-->