Question

我正在尝试使用5个按钮（$ 20，$ 60，$ 100，其他金额和提款）创建一个简单的ATM程序。我需要在按下金钱按钮时创建一个确认框，并在按下撤销按钮时从文本框中扣除金额。这是我的代码：

<form action="" >
    <table>
    <tr>
    <td>
        <input type="button" value="$20" onclick='accept())'/>
    </td>
    <td>

    </td>
    <td>

    </td>
    <td>
        <input type="button" value="Withdrawal" onclick=''/>
    </td>
    </tr>
    <tr>
        <td>
            <input type="button" value="$60" onclick='accept()'/>
        </td>
        <td>Current Balance

        </td>
        <td>
            <input type="Current Balance" value="5000.00" onchange=''/>
        </td>
        <td>

        </td>
    </tr>
    <tr>
        <td>
            <input type="button" value="$100" onclick='accept()'/>
        </td>
        <td>

        </td>
        <td>

        </td>
        <td>

        </td>
    </tr>
    <tr>
        <td>
            <input type="button" value="Other Amount" onclick=''/>
        </td>
        <td>

        </td>
        <td>

        </td>
        <td>

        </td>
    </tr>
    </table>
   </form> 

<script type="text/javascript">

var balance=50000;  

function withdraw(amount)       
{

var sure = confirm("Are You Sure You Want To Withdraw This Amount?");
if(true)
{
balance = balance - amount;
}else
{
alert("No Withdrawal Made");
}
alert("Your Balance Is "+balance);

function 


</script>

请帮忙！这真让我抓狂。谢谢！

Answer 1

我没有清楚地得到问题，但我认为您需要确认您的ATM应用程序的“其他金额”按钮的金额。你假设使用“提示”，使用它就像一个警告框。

<input type="button" value="Get" onclick="prompt('How Much Amount, you want to withdraw?')">

您的代码可以是某种东西，如上所示。

Answer 2

好让我们看看一些问题;

正确缩进代码，它将帮助您更轻松地发现错误。

使用像notepad ++这样的编辑器或更好的IDE，它将显示您的语法错误

不要在标记中使用表格进行布局，请参阅css

<form action="" >
<table>
<tr>
<td>
    <input type="button" value="$20" onclick='accept())'/> // you have an extra closing brace here
</td>
<td>

</td>
<td>

</td>
<td>
    <input type="button" value="Withdrawal" onclick=''/>
</td>
</tr>
<tr>
    <td>
        <input type="button" value="$60" onclick='accept()'/>
    </td>
    <td>Current Balance

    </td>
    <td>
        <input type="Current Balance" value="5000.00" onchange=''/> //Current balance is not a valid type
    </td>
    <td>

    </td>
</tr>
<tr>
    <td>
        <input type="button" value="$100" onclick='accept()'/>
    </td>
    <td>

    </td>
    <td>

    </td>
    <td>

    </td>
</tr>
<tr>
    <td>
        <input type="button" value="Other Amount" onclick=''/>
    </td>
    <td>

    </td>
    <td>

    </td>
    <td>

    </td>
</tr>
</table>

<script type="text/javascript">

var balance=50000;  

function withdraw(amount)   //this function should be called accept not withdraw 
 { //you didn't close this brace

  var sure = confirm("Are You Sure You Want To Withdraw This Amount?");
  if(true)  //should be if (sure)
      {
        balance = balance - amount;
      }else{
        alert("No Withdrawal Made");
      }
       alert("Your Balance Is "+balance);

     function  //this shouldn't be here


</script>

创建一个简单的ATM程序

2 个答案: