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POPick form field values and calculate totals using jquery
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2128774
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2010-01-24T20:52:04.897
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<p>I have a form with these rows:</p> <p> </p> <pre><code> <td> - </td> <input id="invoice_invoice_line_items_attributes_2_item_type" name="invoice[invoice_line_items_attributes][2][item_type]" type="hidden" value="other" /> <td><input id="invoice_invoice_line_items_attributes_2_description" name="invoice[invoice_line_items_attributes][2][description]" size="30" type="text" /></td> <td><input class="short" id="invoice_invoice_line_items_attributes_2_quantity" name="invoice[invoice_line_items_attributes][2][quantity]" size="30" type="text" /></td> <td><input class="short format-currency" id="invoice_invoice_line_items_attributes_2_rate" name="invoice[invoice_line_items_attributes][2][rate]" size="30" type="text" /></td> <td><input class="short format-currency" id="invoice_invoice_line_items_attributes_2_amount" name="invoice[invoice_line_items_attributes][2][amount]" size="30" type="text" /></td> </tr> <tr> <input id="invoice_invoice_line_items_attributes_3_invoice_id" name="invoice[invoice_line_items_attributes][3][invoice_id]" type="hidden" /> <td> - </td> <input id="invoice_invoice_line_items_attributes_3_item_type" name="invoice[invoice_line_items_attributes][3][item_type]" type="hidden" value="other" /> <td><input id="invoice_invoice_line_items_attributes_3_description" name="invoice[invoice_line_items_attributes][3][description]" size="30" type="text" /></td> <td><input class="short" id="invoice_invoice_line_items_attributes_3_quantity" name="invoice[invoice_line_items_attributes][3][quantity]" size="30" type="text" /></td> <td><input class="short format-currency" id="invoice_invoice_line_items_attributes_3_rate" name="invoice[invoice_line_items_attributes][3][rate]" size="30" type="text" /></td> <td><input class="short format-currency" id="invoice_invoice_line_items_attributes_3_amount" name="invoice[invoice_line_items_attributes][3][amount]" size="30" type="text" /></td> </tr> <tr> <input id="invoice_invoice_line_items_attributes_4_invoice_id" name="invoice[invoice_line_items_attributes][4][invoice_id]" type="hidden" /> <td> - </td> <input id="invoice_invoice_line_items_attributes_4_item_type" name="invoice[invoice_line_items_attributes][4][item_type]" type="hidden" value="other" /> <td><input id="invoice_invoice_line_items_attributes_4_description" name="invoice[invoice_line_items_attributes][4][description]" size="30" type="text" /></td> <td><input class="short" id="invoice_invoice_line_items_attributes_4_quantity" name="invoice[invoice_line_items_attributes][4][quantity]" size="30" type="text" /></td> <td><input class="short format-currency" id="invoice_invoice_line_items_attributes_4_rate" name="invoice[invoice_line_items_attributes][4][rate]" size="30" type="text" /></td> <td><input class="short format-currency" id="invoice_invoice_line_items_attributes_4_amount" name="invoice[invoice_line_items_attributes][4][amount]" size="30" type="text" /></td> </tr> </code></pre> <p>I'd like to be able to pick the values from the quantity field, rate field and then calculate the amount which will be displayed in the "_amount" textfield. The amount field should be locked to prevent users from altering the values. Apart from a for loop how I can achieve this?</p>
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<jquery><forms>
Title
Pick form field values and calculate totals using jquery
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  POPick form field values and calculate totals using jquery
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