html
<input type="number" class="aa" value="" id="aaa"/>*
<input type="number" class="bb" value="" id="bbb"/>
<button id="btn">提交</button>
<input type="number" class="cc" value="" id="ccc"/>
js
window.onload=function(){
var btn=document.getElementById('btn');
btn.onclick=function(){
var a =document.getElementById('aaa').value;
var b =document.getElementById('bbb').value;
document.getElementById('ccc').value=a*b;
}
}
jq
$("button").click(function(){
var a =$(".aa").val();
var b =$(".bb").val();
var c =parseInt(a)*parseInt(b);
$(".cc").val(c);
})
扩展:
地址:https://blog.csdn.net/baidu_39043816/article/details/108529848