如何使用javascript在h2标记中显示最终结果
我需要一些JavaScript数学方面的帮助。我想在一个h2标记中显示最终结果,但我不知道怎么做(我不熟悉JavaScript)。请提前帮助和感谢如何使用javascript在h2标记中显示最终结果,javascript,Javascript,我需要一些JavaScript数学方面的帮助。我想在一个h2标记中显示最终结果,但我不知道怎么做(我不熟悉JavaScript)。请提前帮助和感谢 <!doctype html> <html> <head> <title>Do Math</title> </head> <body> <input type = "number" id = "my_input1"/> <input
<!doctype html>
<html>
<head>
<title>Do Math</title>
</head>
<body>
<input type = "number" id = "my_input1"/>
<input type = "number" id = "my_input2"/>
<input type = "button" value = "Add them Together" onclick = "doMath();"/>
<script type = "text/javascript">
function doMath() {
var my_input1 = document.getElementById('my_input1').value;
var my_input2 = document.getElementById('my_input2').value;
//Add them Together and Display
var sum = parseFloat(my_input1) + parseFloat(my_input2);
document.write("<h2>The sum is </h2>", sum);
}
</script>
</body>
</html>
做数学
函数doMath(){
var my_input1=document.getElementById('my_input1').value;
var my_input2=document.getElementById('my_input2').value;
//将它们添加到一起并显示
var sum=parseFloat(my_input1)+parseFloat(my_input2);
文件。填写(“总和为”,总和);
}
试试这个
<html>
<head>
<title>Do Math</title>
</head>
<body>
<input type = "number" id = "my_input1"/>
<input type = "number" id = "my_input2"/>
<input type = "button" value = "Add them Together" onclick = "doMath();"/>
<h2 id="output"></h2>
<script type = "text/javascript">
function doMath() {
var my_input1 = document.getElementById('my_input1').value;
var my_input2 = document.getElementById('my_input2').value;
//Add them Together and Display
var sum = parseFloat(my_input1) + parseFloat(my_input2);
document.getElementById('output').innerHTML = "The sum is " + sum;
}
</script>
</body>
</html>
做数学
函数doMath(){
var my_input1=document.getElementById('my_input1').value;
var my_input2=document.getElementById('my_input2').value;
//将它们添加到一起并显示
var sum=parseFloat(my_input1)+parseFloat(my_input2);
document.getElementById('output').innerHTML=“总和为”+sum;
}
请参见只需获取一个h2标记,并使用
html tag:
<h2 id='ele'></h2>
javascript:
document.getElementById('ele').innerHTML="the sum is "+sum;
html标记:
javascript:
document.getElementById('ele').innerHTML=“总和为”+sum;
不要使用文档。加载页面后写入。这是您想要的getElementByTagName
应该是元素,它返回一个数组(NodeList
),您也可以使用getelementById('one'))
为指定的h2元素指定一个id,如
,如果您喜欢,请单击正确的信号使其正确