function Illuminate(imgDocID,imgObjName) {

document.images[imgDocID].src = eval(imgObjName + ".src")
}

letter1 = new Image;
letter1.src = "letter1.gif";
letter1_at = new Image;
letter1_at.src = "letter1_at.gif";

letter2 = new Image;
letter2.src = "letter2.gif";
letter2_at = new Image;
letter2_at.src = "letter2_at.gif";

letter3 = new Image;
letter3.src = "letter3.gif";
letter3_at = new Image;
letter3_at.src = "letter3_at.gif";

letter4 = new Image;
letter4.src = "letter4.gif";
letter4_at = new Image;
letter4_at.src = "letter4_at.gif";

letter5 = new Image;
letter5.src = "letter5.gif";
letter5_at = new Image;
letter5_at.src = "letter5_at.gif";

letter6 = new Image;
letter6.src = "letter6.gif";
letter6_at = new Image;
letter6_at.src = "letter6_at.gif";