// JavaScript Document
var backgr1="../img/visual_albero.jpg"
var backgr2="../img/visual_aria.jpg"
var backgr3="../img/visual_acqua.jpg"
var backgr4="../img/visual_terra.jpg"
var backgr5="../img/visual_fuoco.jpg"

var cur=Math.round(5*Math.random())
if (cur<1)
backgr=backgr1
else if (cur<2)
backgr=backgr2
else if (cur<3)
backgr=backgr3
else if (cur<4)
backgr=backgr4
else 
backgr=backgr5
document.write('<div id="container" style="background:url('+backgr+') no-repeat right top">')