function changepic() {
var element, newElement, parent;

// Get the original element
element = document.getElementById("piccy");

// Assuming it exists...
if (element) {
    // Get its parent
    parent = element.parentNode;

    // Create the new element
    newElement = document.createElement('div');

    // Set its ID and content
    newElement.id = "piccy2";
    newElement.innerHTML = "-new content here-";

    // Insert the new one in front of the old one (this temporarily
    // creates an invalid DOM tree [two elements with the same ID],
    // but that's harmless because we're about to fix that).
    parent.insertBefore(newElement, element);

    // Remove the original
    parent.removeChild(element);
}
}