var numeroOgg = 3;
				 var x=0;
				 while (x>numeroOgg || x==0) {
				 		x=Math.round((Math.random()*100));
				 }
				 if (x<10) x="0"+x;
				 var img="img/img_home_"+x+".jpg";
				 document.write("<style>#imghome{background: url("+img+") top left;}</style>");