Operate table dynamically through JS (add and delete related column information)

1. Get the table object
VaR objtable = Document. getelementbyid ("tb_visitor ");
2. Add a row
VaR objtemprow = objtable. Rows [0]; // obtain the template row.
VaR objnewrow = objtable. insertrow (objtable. Rows. Length );
Objnewrow. ID = objtable. Rows. Length-1;
// Add information about a row
For (VAR I = 0; I <objtemprow. cells. length; I ++)
{
VaR objnewcell = objnewrow. insertcell (I );
Objnewcell. innerhtml = objtemprow. cells [I]. innerhtml;
//
If (objnewcell. innerhtml. indexof ("value = ")! =-1 ){
VaR Si = objnewcell. innerhtml. indexof ("value =") * 1 + 6;
VaR Ei = objnewcell. innerhtml. indexof ("> ");
VaR cellvalue = objnewcell. innerhtml. substring (Si, EI );
// Clear the content of the new column and make it available
Objnewcell. innerhtml = objnewcell. innerhtml. Replace (cellvalue, ''). Replace ('Disabled ','');
}
}
// Click the row to be added
Objnewrow. onclick = new function ("fn_clickrow (this );");
3. delete a row
Objtable. deleterow (objrow. Index );