Update SPListItem with JavaScript

I was creating a custom action to update the selected items.
You would think - really easy right - well not for me :-( Hope following JavaScript code helps for you though.


var ctx;
var notifyId = '';
function updateListItem(){
  this.notifyId = SP.UI.Notify.addNotification('Updating items...', true);

  // Get the current ClientContext
  this.ctx = new SP.ClientContext.get_current();      
                     
  // Get the current Web
  var web = this.ctx.get_web();    
                        
  // Get the currently selected list
  var listId = SP.ListOperation.Selection.getSelectedList();
  var sourceList = web.get_lists().getById(listId);        

  // Get the selected items and update each of them
  var items = SP.ListOperation.Selection.getSelectedItems(this.ctx);            
  if(confirm('Are you sure?')){
    for(var i = 0; items.length > i; i++) {
      var listItem = sourceList.getItemById(items[i].id);
      this.ctx.load(listItem);
      listItem.set_item('EUTTT_SP_IsIdentified', 'Identified');
      listItem.update();
    }
 }
  else {
    for(var i = 0; items.length > i; i++) {
      var listItem = sourceList.getItemById(items[i].id);
      this.ctx.load(listItem);
      listItem.set_item('EUTTT_SP_IsIdentified', 'Abandoned');
      listItem.update();
    }
  }
  this.ctx.executeQueryAsync( Function.createDelegate(this, onUpdateSucceeded), Function.createDelegate(this, onQueryFailed));
}
                         
function onUpdateSucceeded(sender, args) {
  SP.UI.Notify.removeNotification(this.notifyId);
  SP.UI.ModalDialog.RefreshPage( SP.UI.DialogResult.OK);
}
                         
function onQueryFailed(sender, args) {
  SP.UI.Notify.removeNotification(this.notifyId);
  SP.UI.Notify.addNotification('The update operation failed.', true);
}
updateListItem();