if (document.images)
    	{  	INFO1 = new Image ();
       		INFO1.src = "images/INFOoff.gif"
       		INFO2 = new Image ();
       		INFO2.src = "images/INFOon.gif"
					
					BEL1 = new Image ();
       		BEL1.src = "images/BELoff.gif"
       		BEL2 = new Image ();
       		BEL2.src = "images/BELon.gif"
					
					AAN1 = new Image ();
       		AAN1.src = "images/AANoff.gif"
       		AAN2 = new Image ();
       		AAN2.src = "images/AANon.gif"
					
			OPL1 = new Image ();
       		OPL1.src = "images/OPLoff.gif"
       		OPL2 = new Image ();
       		OPL2.src = "images/OPLon.gif"
			}

function loadimage(imageName, imageLocation, texto)

      	{  	if (document.images)
        {  	document.images[imageName].src = imageLocation;
        }
         	window.status = texto;

         	return true;
      	}

function cambia_clase (cosa, estilo)
		{  cosa.className = estilo;
		}

function resalta_texto (boton,color)
		{  boton.style.color = color;
		}