javascript if语句返回值

时间:2018-12-06 15:40:18

标签: javascript html

我正试图从一个名为ValuationChoice(标记为Job Value)的html输入框中获取一个数值,并将其传递给Javascript函数(GetPermit_Price),在Javascript函数中,它通过遍历嵌入ValuationChoice的值来获取许可成本。无论我在ValuationChoice输入框中键入什么,结果值都将保持为0。我将如何进行这项工作的任何建议将不胜感激。预先感谢!

function GetPermit_Price() {

  var PermitCost = 0;
  var theForm = document.forms["cakeform"];
  var Valuation =
    theForm.elements["ValuationChoice"];

  if (Valuation > 0 && Valuation <= 1000) {
    PermitCost = 0;
  }

  if (Valuation > 1001 && Valuation <= 50000) {
    PermitCost = (((Valuation - 1000) / 1000) * 5.50) + 25;
  }

  if (Valuation > 50001 && Valuation <= 100000) {
    PermitCost = (((Valuation - 50000) / 1000) * 4.50) + 294.50;
  }

  if (Valuation > 100001 && Valuation < 500000) {
    PermitCost = (((Valuation - 100000) / 1000) * 3.50) + 519.50;
  }

  if (Valuation > 500001) {
    PermitCost = (((Valuation - 500000) / 1000) * 2.25) + 1919.50;
  }

  return PermitCost;
}

function calculateTotal() {

  var cakePrice = GetPermit_Price() + 5 + 10.00;

  var divobj7 = document.getElementById('permitFee');
  divobj7.style.display = 'block';
  divobj7.innerHTML = "Permit Fee: $" +
    GetPermit_Price();
}

function hideTotal() {
  var divobj = document.getElementById('totalPrice');
  divobj.style.display = 'none';
}
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 
    Strict//EN" 
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1- 
    strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">

<head>
  <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
  <title>Cake Form</title>
  <script type="text/javascript" src="js/formcalculations.js"></script>
  <link href="styles/cakeform.css" rel="stylesheet" type="text/css" />

</head>

<body onload='hideTotal()'>
  <div id="wrap">
    <form action="" id="cakeform" onsubmit="return 
    false;">
      <div>
        <div class="cont_order">
          <fieldset>
            <legend>Calculate Permit</legend>

            <label>Job Value</label>
            <input type="text" id="ValuationChoice" name='ValuationChoice' />

            <p>
            </p>
            <div id="permitFee"></div>
            <br/>

            <br/>
            <div id="totalPrice"></div>

            <input type='submit' id='submit' value='Calculate Permit' onclick="calculateTotal()" />

          </fieldset>
        </div>

      </div>
    </form>
  </div>
  <!--End of wrap-->

</body>

</html>

2 个答案:

答案 0 :(得分:8)

评估是输入字段,而不是其值。

尝试:

var Valuation = theForm.elements["ValuationChoice"].value;

答案 1 :(得分:1)

因此,首先输入的内容应该是type=number,为什么不仅仅找到如下所示的输入值

const Valuation = document.getElementById('ValuationChoice').value;

并确保只是简单地控制台记录您获得的信息

console.log(Valuation);

这将帮助您调试并查看您是否还获得了一个数字输入,如果您使用文本输入,您可能不会获得该数字。