計算訂單價格按日期選擇值

Question

好吧，我知道有一個簡單的方法來做到這一點，但它已經多年，因爲我已經做了很多的JavaScript

我的客戶對事件註冊的在線訂單形式（由開發以前的web dev。）。目前，訂單總額只有一個隱藏字段：

<INPUT value=78.00 type=hidden name=amount /> 

但我需要總來計算基礎上，他們選擇什麼日期：

<SELECT style="BACKGROUND-COLOR: #ffff99" name=altDate1> 
<OPTION value=04/09> Friday, April 9 </OPTION> 
<OPTION value=04/14> Wednesday, April 14 </OPTION> 
<OPTION value=04/16> Friday, April 16 </OPTION> 
<OPTION value=04/19> Monday, April 19 </OPTION> 
<OPTION value=04/29> Thursday, April 29 </OPTION> 
</SELECT> 

這是處理表單的JavaScript：

<SCRIPT language=Javascript> 

function PaymentButtonClick() { 

    document.addform.Product_Name.value = document.Information.StudentLastName.value + ","+ 
              document.Information.StudentFirstName.value+","+ 
              document.Information.StudentID.value+","+ 
              document.Information.altDate1.name+","+","+ 
              document.Information.Guests.value+ "," + 
              document.Information.StudentType.value; 

    document.addform.Product_Code.value = document.Information.StudentID.value; 


    if ((document.Information.UCheck.checked==true) && 
     (document.Information.altDate1.value != "") && 
     (document.Information.altDate1.value != "x")) { 

     if (document.Information.StudentLastName.value != "" || 
      document.Information.StudentFirstName.value != "" || 
      document.Information.StudentID.value != "") { 

       document.addform.submit(); 
     } 
     else { 
      alert("Please enter missing information"); 
     } 
    } 
} 

</SCRIPT> 

Answer 1

將此switch聲明插入您的表單處理函數中：

switch (document.Information.altDate1.value) { 
    case '04/09': 
     document.Information.amount.value = 78.00; 
     break; 
    case '04/14': 
     document.Information.amount.value = 79.00; 
     break; 
    case '04/16': 
     document.Information.amount.value = 80.00; 
     break; 
    case '04/19': 
     document.Information.amount.value = 81.00; 
     break; 
    case '04/29': 
     document.Information.amount.value = 82.00; 
     break; 
}