function derecha()
{
//1
var ranNum= Math.round(Math.random() * 1);
if (ranNum == 0){document.write('<a href="http://chely.cl"><img src="http://chely.cl/pelu/Color/Color6.jpg" alt="disponible banner publicitario 100x122" border="0" width=100 height=122></a>'); } // 2derecha
if (ranNum == 1){document.write('<a href="http://chely.cl"><img src="http://chely.cl/pelu/Color/Color4.gif" alt="disponible banner publicitario 100x122" border="0" width=100 height=122></a>'); } // 1derecha
}