var whichMenu=" ";

         //preload the images...
         //about = new Image(160,314);
         //about.src="/images/about_second_final.jpg";

function activate(number)
{
     eval ("document.number" + number + ".src" + "= '/images/overbutton" + number + ".jpg'");
     eval ("document.descript" + number + ".src" + "= '/images/newtext" + number + ".jpg'");

     if (number == 1){
       eval ("document.picture.src = '/images/risa_half_soft.jpg'");
     }
     else if (number == 2){
       eval ("document.picture.src = '/images/dnachart.gif'");
     }
     else if (number == 3){
       eval ("document.picture.src = '/images/tree_maybe1.jpg'");
     }
     else if (number == 4){
       eval ("document.picture.src = '/images/character.jpg'");
     }
}

function deactivate(number)
{
     eval ("document.number" + number + ".src" + "= '/images/overbutton" + number + ".jpg'");
     eval ("document.descript" + number + ".src" + "= '/images/background1.jpg'");
}