function toggle_slideshow() {
var div1 = document.getElementById("the_3d_image");
var div2 = document.getElementById("slideshow");

var button1 = document.getElementById("see_slideshow");
var button2 = document.getElementById("see_3d_image");

div1.style.display = 'none';
div2.style.display = 'block';

button1.style.display = 'none';
button2.style.display = 'block';

}


function toggle_3d_image() {
var div1 = document.getElementById("the_3d_image");
var div2 = document.getElementById("slideshow");

var button1 = document.getElementById("see_slideshow");
var button2 = document.getElementById("see_3d_image");

div1.style.display = 'block';
div2.style.display = 'none';

button1.style.display = 'block';
button2.style.display = 'none';

}