选中复选框后,通过下一页时,将重置复选框值和总和值。我应该如何修改?
PHP代码:
while($row = mysqli_fetch_array($result)){
echo "<tr>";
echo "<td > <input name='amount' type='checkbox' value ='" . $row['amount'] . " ' onclick='totalIt()'></td>";
echo "<td>" . $row['id'] . "</td>";
echo "<td>" . $row['DATE'] . "</td>";
echo "<td>" . $row['amount'] . "</td>";
echo "</tr>";
}
echo "</tbody>";
echo "</table>";
echo " <input value='₩0' readonly='readonly' type='text' name='total' />";
// Free result set
mysqli_free_result($result);
JavaScript代码:
function totalIt() {
var input = document.getElementsByName("amount");
var total = 0;
for (var i = 0; i < input.length; i++) {
if (input[i].checked) {
total += parseFloat(input[i].value);
}
}
document.getElementsByName("total")[0].value = "₩" + total;
}
又如何预先检查一个值?