if (document.images) {

img01on=new Image(60,40);
img01on.src="img/r2_c10.gif";
img01off=new Image(60,40);
img01off.src="img/r2_c10_f2.gif";

img02on=new Image(60,40);
img02on.src="img/r2_c13.gif";
img02off=new Image(60,40);
img02off.src="img/r2_c13_f2.gif";

img03on=new Image(60,40);
img03on.src="img/r2_c8.gif";
img03off=new Image(60,40);
img03off.src="img/r2_c8_f2.gif";


   }

function imgOn(imgName) {

if (document.images) {

document[imgName].src=eval (imgName + "on.src");

}

}

function imgOff(imgName) {

if (document.images) {

document[imgName].src=eval (imgName +"off.src");

}

}