Question

所以我有一个在线商店，我有一个调用名为var poster_image_path = pswp.currItem.html.split('"')[1]的函数的按钮，但在Javascript中这个函数有purchase()。所以，您可以轻松地在onclick函数purchase(name, amount)中输入名称，但我的问题是我可以如何计算金额？金额是从onclick="purchase('milk')元素中选择的。

我也创建了一些JSFiddle，所以你可以看看：https://jsfiddle.net/w2bk9hw8/

Answer 1

使用jquery你可以做到这一点;

 <button class="button" onclick="payment('milk', $('select').val())">$1.85</button>

Answer 2

JQuery less解决方案可能是：

declare
  l_alter_stmt_1 varchar2(4000);
  l_alter_stmt_2 varchar2(4000);
  l_adjust_stmt varchar2(4000);
  l_nextval number;
begin
  for r in (select * from user_sequences) loop
    l_adjust_stmt := 'select "' || r.sequence_name || '".nextval from dual';
    execute immediate l_adjust_stmt into l_nextval;
    l_alter_stmt_1 := 'ALTER SEQUENCE "' || r.sequence_name || '"'
        || ' INCREMENT BY '|| (r.min_value - l_nextval);
    l_alter_stmt_2 := 'ALTER SEQUENCE "' || r.sequence_name || '"'
        || ' INCREMENT BY ' || r.increment_by;
    dbms_output.put_line(l_alter_stmt_1);
--    execute immediate r.alter_stmt_1;
    dbms_output.put_line(l_adjust_stmt);
--    execute immediate l_adjust_stmt into l_nextval;
    dbms_output.put_line(l_alter_stmt_2);
--    execute immediate l_alter_stmt_2;
  end loop;
end;
/

PL/SQL procedure successfully completed.

ALTER SEQUENCE "SUPPLIER_SEQUENCE" INCREMENT BY -101
select "SUPPLIER_SEQUENCE".nextval from dual
ALTER SEQUENCE "SUPPLIER_SEQUENCE" INCREMENT BY 1

Answer 3

没有什么奇怪的。你只需编写函数并调用它。

function purchase(product){
      var select = document.querySelector("select#id");
      alert('You have ordered '+select.value+' unit(s) of ' + product);
    }

  <select id="id">
    <option value="1">1</option>
    <option value="2">2</option>
    <option value="3">3</option>
    <option value="4">4</option>
    <option value="5">5</option>
  </select>
  <button onclick="purchase('milk')">test</button>

Answer 4

function payment(name, amount) {
        console.log(amount,name);
  }

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<select  id="quantity">
  <option value="1">1</option>
  <option value="2">2</option>
  <option value="3">3</option>
  <option value="4">4</option>
  <option value="5">5</option>
</select>
<button class="button" onclick="payment('milk', $('#quantity').val())">$1.85</button>

找到Fiddle

如果适合您，请标记

Answer 5

这应该有用（纯javascript）：

<select id="amount">
  <option>1</option>
  <option>2</option>
  <option>3</option>
  <option>4</option>
  <option>5</option>
</select>
<button class="button" onclick="order('milk', getAmount)">$1.85</button>

<script>
  function order(name, amount) {
    alert(name);
    alert(getAmount());
  }

    function getAmount(){
    return document.getElementById('amount').value
  }

</script>

Answer 6

选择一个ID，然后它非常简单：

＆＃13;

<select id="target-select">
  <option>1</option>
  <option>2</option>
  <option>3</option>
  <option>4</option>
  <option>5</option>
</select>
<button class="button" onclick="payment('milk', document.getElementById('target-select').value)">$1.85</button>

<script>
  function payment(name, amount) {
    alert(name);
    alert(amount);
  }

</script>

＆＃13;

Answer 7

考虑到发布时的答案都在Jquery中，我在JS中提供答案。

为每个选项提供值

我已经为选择添加了值，因为它们是为每个选择选项分配哪个号码所必需的。

  <option value="2">2</option>

获取所选选项的值

要获取选择按钮的值，您可以使用document.getElementById（＆＃39; sel＆＃39;）访问该按钮，并使用.value运算符来获取所选选项。

document.getElementById('sel').value)

您可以在下面找到该片段。

＆＃13;

 function order(name, amount) {
    alert(name);
    alert(amount);
  }

＆＃13;

<select id="sel">
  <option value="1">1</option>
  <option value="2">2</option>
  <option value="3">3</option>
  <option value="4">4</option>
  <option value="5">5</option>
</select>
<button class="button" onclick="order('milk',document.getElementById('sel').value)">$1.85</button>

＆＃13;

Answer 8

你可以做这样的事情：

＆＃13;

$('#myselect').on('click', function(){
var value  = $('#myselect option:selected').val();
$('button').html(value +'$');
})

＆＃13;

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.2/jquery.min.js"></script>
<select id="myselect">
  <option>1</option>
  <option>2</option>
  <option>3</option>
  <option>4</option>
  <option>5</option>
</select>
<button class="button">$1.85</button>

＆＃13;

Answer 9

如果您在页面上有多个按钮...

$('button').on('click', function() {
    payment('milk', $(this).attr("value"));
});

HTML / Javascript - 使用变量按钮onClick调用函数

9 个答案: