tabel

<table class="table table-bordered">
							<tr>
							    <th><input class='check_all' type='checkbox' onclick="select_all()"/></th>
							    <th>#</th>
							    <th>Kode Barang</th>
							    <th>Nama Barang</th>
							    <th>Stock</th>
							    <th>Jumlah</th>
							    <th>Harga</th>
							    <th>Total</th>
							</tr>
							<tr>
						    	<td><input type='checkbox' class='case'/></td>
						    	<td><span id='snum'>1.</span></td>
						   	 	<td><input class="form-control" type='text' id='kodebarang_1' name='kodebarang[]'/></td>
						    	<td><input class="form-control" type='text' id='namabarang_1' name='namabarang[]' readonly /></td>
						    	<td><input class="form-control" type='text' id='stock_1' name='stock[]' readonly /></td>
								<!---all i need is how do i make multiplication auto when user add row-->
						    	<td><input class="form-control" type='text' id='jumlah_1' name='jumlah[]' onkeyup="hitung2(this);" /> </td>
								<td><input class="form-control" type='text' id='harga_1' name='harga[]' onkeyup="hitung2(this);"/> </td>
						    	<td><input class="form-control" type='text' id='total_1' name='total[]' readonly  /> </td>
						  	</tr>
					  	</table>
					  	<button type="button" class='btn btn-danger delete'>- Delete</button>
						<button type="button" class='btn btn-success addmore'>+ Add More</button>
						<button type="submit" class="btn btn-primary">Submit</button>