您好,我的网站上有此代码
<body>
<script>
function calcResult() {
document.getElementById('result').innerHTML = '';
var num1 = new Number(document.getElementById('txt1').value);
var num2 = new Number(document.getElementById('txt2').value);
if (isNaN(num1) || isNaN(num2)) {
alert('One or both inputs are not a number');
} else {
document.getElementById('result').innerHTML = num1 * num2;
}
}
window.onload = function() {
document.getElementById('btnCalc').onclick = calcResult;
}
</script>
<div>
Enter value 1
<input type="text" id="txt1" />
<br />Enter value 2
<input type="text" id="txt2" />
<br />
<button id="btnCalc">Calculate difference</button>
<div id="result"></div>
</div>
<script>
function test() {
document.getElementById('re').innerHTML = '';
var n1 = new Number(document.getElementById('od1').value);
var n2 = new Number(document.getElementById('od2').value);
if (isNaN(n1) || isNaN(n2)) {
alert('One or both inputs are not a number');
} else {
document.getElementById('re').innerHTML = n1 - n2;
}
}
window.onload = function() {
document.getElementById('od').onclick = test;
}
</script>
<div>
Enter value 1
<input type="text" id="od1" />
<br />Enter value 2
<input type="text" id="od2" />
<br />
<button id="od">Calculate difference</button>
<div id="re"></div>
</div>
</body>
问题是第一种形式不起作用,第二种形式起作用。在我的网站上我想要很多这些计算器,但我不知道为什么不工作。如果有人帮我找到结果,我会满分。
答案 0 :(得分:0)
将所有javascript代码写入一个脚本标记中。请尝试以下代码
<body>
<script>
function calcResult(){
document.getElementById('result').innerHTML = '';
var num1 = new Number(document.getElementById('txt1').value);
var num2 = new Number(document.getElementById('txt2').value);
if(isNaN(num1) || isNaN(num2)){
alert('One or both inputs are not a number');
} else {
document.getElementById('result').innerHTML = num1 * num2;
}
}
function test(){
document.getElementById('re').innerHTML = '';
var n1 = new Number(document.getElementById('od1').value);
var n2 = new Number(document.getElementById('od2').value);
if(isNaN(n1) || isNaN(n2)){
alert('One or both inputs are not a number');
} else {
document.getElementById('re').innerHTML = n1 - n2;
}
}
window.onload=function(){
document.getElementById('btnCalc').onclick = calcResult;
document.getElementById('od').onclick = test;
}
</script>
<div>
Enter value 1 <input type="text" id="txt1" /><br />
Enter value 2 <input type="text" id="txt2" /><br />
<button id="btnCalc">Calculate difference</button>
<div id="result"></div>
</div>
<div>
Enter value 1 <input type="text" id="od1" /><br />
Enter value 2 <input type="text" id="od2" /><br />
<button id="od">Calculate difference</button>
<div id="re"></div>
</div>
</body>
答案 1 :(得分:0)
如果两个函数相等(你只想执行三个不同的元素),
使用元素的ID作为函数参数中的参数,并根据需要随意调用任何差异ID。
<body>
<script>
<div>
Enter value 1 <input type="text" id="txt1" /><br />
Enter value 2 <input type="text" id="txt2" /><br />
<button id="btnCalc">Calculate difference</button>
<div id="result"></div>
</div>
<script>
function test(id){
document.getElementById(id, id2, id3).innerHTML = '';
var n1 = new Number(document.getElementById(id2).value);
var n2 = new Number(document.getElementById(id3).value);
if(isNaN(n1) || isNaN(n2)){
alert('One or both inputs are not a number');
} else {
document.getElementById(id).innerHTML = n1 - n2;
}
}
window.onload=function(){
document.getElementById('btnCalc').onclick = function(){ test("result", "txt1", "txt2") };
document.getElementById('od').onclick = function(){ test("re", "od1", "od2") };
}
</script>
<div>
Enter value 1 <input type="text" id="od1" /><br />
Enter value 2 <input type="text" id="od2" /><br />
<button id="od">Calculate difference</button>
<div id="re"></div>
</div>
答案 2 :(得分:0)
<script type="text/javascript">
function calcResult(resultId, valId, val2Id, operation) {
var $result = document.getElementById(resultId);
$result.innerHTML = '';
var num1 = new Number(document.getElementById(valId).value);
var num2 = new Number(document.getElementById(val2Id).value);
if (isNaN(num1) || isNaN(num2)) {
alert('One or both inputs are not a number');
} else {
$result.innerHTML = operation(num1, num2);
}
}
window.onload = function() {
document.getElementById('btnCalc').onclick = function() {
calcResult('result', 'txt1', 'txt2', function(num1, num2) {
return num1 * num2;
});
}
document.getElementById('od').onclick = function() {
calcResult('re', 'od1', 'od2', function(num1, num2) {
return num1 - num2;
});
};
}
</script>
<script>
标记中。我可以看到,虽然你的按钮被命名为"calculate difference"
,但是
第一种形式是计算product
而第二种形式是计算difference
,因此,使用此方法,
你可以用这样的方式重写你的代码,你只有一个函数用于这两个操作,
只需传递elementIds
作为参数和function
,其中需要注意应用哪个操作。就像我上面写的那个。