<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>加减乘除</title> <script src="a.js"></script>//引用js </head> <body> <p>a=3,b=2;</p> <input type="button" onclick="alert(sum(3,2))" value="加" /> <input type="button" onclick="alert(jian(3,2))" value="减" /> <input type="button" onclick="alert(cheng(3,2))" value="乘" /> <input type="button" onclick="alert(chu(3,2))" value="除" /> </body> </html>
js代码：
function sum(a,b){
var c;
c=a+b;
return c;
}
function jian(a,b){
var c;
c=a-b;
return c;
}
function cheng(a,b){
var c;
c=a*b;
return c;
}
function chu(a,b){
var c;
c=a/b;
return c;
}