[英]Simple Javascript Math
I am trying to perform the very simple task of doing simple multiplication below. 我正在尝试执行以下简单乘法的非常简单的任务。 I cannot get the input field to participate in the code below.
我无法获得输入字段来参与下面的代码。 Please let me know how I might be able to get this to work.
请让我知道我如何能够使它工作。 Thank you all!
谢谢你们!
<!DOCTYPE html>
<html>
<body>
<?php
$count="20";
?>
<input id="spend">
<button onclick="myFunction()">Calculate</button>
<p id="demo"></p>
<script>
function myFunction()
{
y=<?php echo "$count"; ?>;
z=document.getElementById('spend').innerHTML;
x=y+z;
document.getElementById("demo").innerHTML=x;
}
</script>
</body>
</html>
Hi try this code it's working 嗨,尝试此代码,它可以正常工作
<!DOCTYPE html>
<html>
<body>
<?php
$count=20;
?>
<input id="spend">
<button onclick="myFunction()">Calculate</button>
<p id="demo"></p>
<script>
function myFunction()
{
var y=<?php echo $count; ?>;
var z=document.getElementById('spend').value;
var x=y*z;
document.getElementById("demo").innerHTML=x;
}
</script>
</body>
</html>
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