// create a radio var radio = (HTMLInputElement)document.CreateElement("input"); radio.Type = "radio"; radio.Id = "ECUAWEBSITE"; radio.Name = "OLGER ERAZO"; radio.Checked = true; // create a label for radio var label = (HTMLLabelElement)document.CreateElement("label"); label.For = "ECUAWEBSITE"; label.TextContent = "LA TOXICA";