if (document.images) {            // Active Images
            img0on = new Image();      
            img0on.src = "boton0_on.gif";
            img1on = new Image();      
            img1on.src = "boton1_on.gif";
  	    img11on = new Image();      
            img11on.src = "boton11_on.gif";
		img2on = new Image();      
            img2on.src = "boton2_on.gif";
  	    img3on = new Image();      
            img3on.src = "boton3_on.gif";
	    img4on = new Image();      
            img4on.src = "boton4_on.gif";
	    img5on = new Image();      
            img5on.src = "boton5_on.gif";
	    img6on = new Image();      
            img6on.src = "boton6_on.gif";     
	    img7on = new Image();      
            img7on.src = "boton7_on.gif";
       	    img8on = new Image();      
            img8on.src = "boton8_on.gif";
		 img9on = new Image();      
            img9on.src = "boton9_on.gif";	 
			  
			  

            img0off = new Image();      
            img0off.src = "boton0_off.gif";
	    img1off = new Image();      
            img1off.src = "boton1_off.gif";
  	   img11off = new Image();      
            img11off.src = "boton11_off.gif"; 
		img2off = new Image();      
            img2off.src = "boton2_off.gif";
  	    img3off = new Image();      
            img3off.src = "boton3_off.gif";
	    img4off = new Image();      
            img4off.src = "boton4_off.gif";
	    img5off = new Image();      
            img5off.src = "boton5_off.gif";
	    img6off = new Image();      
            img6off.src = "boton6_off.gif";     
	    img7off = new Image();      
            img7off.src = "boton7_off.gif";
	    img8off = new Image();      
            img8off.src = "boton8_off.gif";
		img9off = new Image();      
            img9off.src = "boton9_off.gif";	  
        


        }

// Function to 'activate' images.
function imgOn(imgName) {
        if (document.images) {
            document[imgName].src = eval(imgName + "on.src");
        }
}

// Function to 'deactivate' images.
function imgOff(imgName) {
        if (document.images) {
            document[imgName].src = eval(imgName + "off.src");
        }
}

// Function to 'activate' images.
function imgClick(imgName) {
        if (document.images) {
            document[imgName].src = eval(imgName + "click.src");
        }
}