Through JS dynamic operation table (add, delete related column information) _javascript tips

1. Get the Table object
var Objtable=document.getelementbyid ("Tb_visitor");
2, add a line
var objtemprow = objtable.rows[0]; Get Template Line
var objnewrow = Objtable.insertrow (objTable.rows.length);
Objnewrow.id = objtable.rows.length-1;
Add related information for 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);
Empty new column contents and become available
Objnewcell.innerhtml=objnewcell.innerhtml.replace (Cellvalue, '). Replace (' disabled ', ');
}
}
Add a line Click event
Objnewrow.onclick = new Function ("Fn_clickrow (this);");
3, delete a row
Objtable.deleterow (Objrow.index);