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我正在計算基於userinput的價格。當用戶輸入頁數時,它將乘以2,結果將顯示在#result框中。現在,當用戶單擊複選框時,總數(#result)值將乘以3並顯示在#result文本框中。當用戶點擊它時,舊的結果應該顯示在文本框中。複選框單擊作品,取消選中複選框不工作Javascript
例,
Total number of pages: 2 ---> total: 4
checkbox clicked ----> total: 12
checkbox unchecked ---> total: 4
當單擊顯示值12的複選框,但是當我取消選中該複選框值仍是12,而不是顯示4 ...
誰能幫助我與解決方案
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Calculating</title>
<script>
function calculate()
{
var myBox1 = document.getElementById('pages').value;
if(isNaN(myBox1))
{
alert('Enter only numbers');
}
else
{
const myBox2=2;
var result = document.getElementById('result');
var myResult = myBox1 * myBox2;
result.value = myResult;
}
}
function checkbox1()
{
var result1 = document.getElementById('result').value;
const bresult=result1;
if(document.getElementById('ckbox').checked === true)
{
const checks=3;
var myResult1=result1 * checks;
result.value = myResult1;
}
if(document.getElementById('ckbox').checked === false)
{
result.value=bresult;
}
}
</script>
</head>
<body>
<table>
<tr>
<td>Number of Pages</td>
<td>Check Boxes</td>
<td>Total</td>
</tr>
<tr>
<td><input id="pages" type="text" oninput="calculate()" /></td>
<td><input type="checkbox" id="ckbox" onclick="checkbox1()">Assistance</td>
<td><input id="result" /></td>
</tr>
</table>
</body>
</html>
它正在工作!謝謝@balachandar – JavaLearner1