function loadImg( ) {
// precache images for rollovers
var h1_over = new Image(102, 55);
h1_over.src="../img/over_h1.jpg";
var h2_over = new Image(102, 55);
h2_over.src="../img/over_h2.jpg";
var h3_over = new Image(102, 55);
h3_over.src="../img/over_h3.jpg";
var h4_over = new Image(102, 55);
h4_over.src="../img/over_h4.jpg";
var h5_over = new Image(102, 55);
h5_over.src="../img/over_h5.jpg";
}