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JS operation numerical calculation in input tag

php中世界最好的语言Original: 2018-04-19 10:21:172453browse

This time I bring to you, what are the precautions, the following is a practical case, let's take a look.

<!DOCTYPE html>
<html>
<head>
<metacharset="UTF-8">
<title></title>
<script>
window.onload=function(){
var oIput1=document.getElementById(&#39;put1&#39;);
var oIput2=document.getElementById(&#39;put2&#39;);
var nAdd=document.getElementById(&#39;add&#39;);
var nSub=document.getElementById(&#39;subtraction&#39;);
nAdd.onclick=function(){
var a=Number(oIput1.value);
var b=Number(oIput2.value);
c = a+b;
alert(c);
}
nSub.onclick=function(){
var a=Number(oIput1.value);
var b=Number(oIput2.value);
c = a-b;
alert(c);
}
}
</script>
</head>
<body>
数值1:<inputid="put1"type="text"value=""/>
数值2：<inputid="put2"type="text"value=""/>
<inputtype="button"id="add"value="求和"/>
<inputtype="button"id="subtraction"value="相减"/>
</body>
</html>

# I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!

JS operation numerical calculation in input tag

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