How to Copy items with client object model SharePoint 2010

Example of  how to Copy items from one list to another with client object model Sharepoint 2010. You would use File.copyTo(_destinationlibUrl, true); function to do this.

Code Example -

function CopyOperation()
{
var context = SP.ClientContext.get_current();
var web = context.get_web();
context.load(web);
var _destinationlib = web.get_lists().getByTitle('DestinationLibrary');
context.load(_destinationlib);
var notifyId;
var currentlibid = SP.ListOperation.Selection.getSelectedList();
var currentLib = web.get_lists().getById(currentlibid);
var selectedItems = SP.ListOperation.Selection.getSelectedItems(context);
var count = CountDictionary(selectedItems);

for(var i in selectedItems)
{
var currentItem = currentLib.getItemById(selectedItems[i].id);
context.load(currentItem);
var File = currentItem.get_file();
context.load(File);
//Excecuting executeQueryAsync to get the loaded values
context.executeQueryAsync(
function (sender, args) {
if(File != null) {
var _destinationlibUrl =  web.get_serverRelativeUrl() + _destinationlib.get_title() + '/' +  File.get_name();

File.copyTo(_destinationlibUrl, true);

notifyId = SP.UI.Notify.addNotification('Moving file…' + File.get_serverRelativeUrl() + 'to' + _destinationlibUrl, true);

context.executeQueryAsync(
function (sender, args) {
SP.UI.Notify.removeNotification(notifyId);
SP.UI.Notify.addNotification('File copied successfully', false);
},
function (sender, args) {
SP.UI.Notify.addNotification(‘Error copying file’, false);
SP.UI.Notify.removeNotification(notifyId);
showError(args.get_message());
});
}
},
function (sender, args) {
alert('Error occured’ + args.get_message());
}
);
}