Cómo crear la columna de la Tabla 5 en HTML y agregarla en el selector de Qury y eliminarla

mybody = document.getElementsByTagName("body")[0];
mytable = mybody.getElementsByTagName("table")[0];
mytablebody = mytable.getElementsByTagName("tbody")[0];
myrow = mytablebody.getElementsByTagName("tr")[1];
mycel = myrow.getElementsByTagName("td")[1];

// first item element of the childNodes list of mycel
myceltext=mycel.childNodes[0];

// content of currenttext is the data content of myceltext
currenttext=document.createTextNode(myceltext.data);
mybody.appendChild(currenttext);
Samapika Sahoo