// Simple DIV replacement using prototype javascript library
// http://prototype.conio.net/
// Good docs at http://www.sergiopereira.com/articles/prototype.js.html
function getSnippet(targetDiv, snippetName) {
    var snippetURL = "snippets/" + snippetName + ".snippet";
    var opt = {
       // Use GET
       method: 'get',
       // Handle 404
       on404: function(request) {
          alert('Error 404: "' + request.statusText + '" -- xhtml snippet was not found.');
       },
       // Handle other errors
       onFailure: function(request) {
          alert('Error ' + request.status + ' -- ' + request.statusText);
       },
       asynchronous: true
    }
    new Ajax.Updater({success: targetDiv}, snippetURL, opt);
}