<button onclick="numbers.forEach(myFunction)">点我</button>
<p>数组元素总和：<span id="demo"></span></p>
<script>
var sum = 0;
var numbers = [65, 44, 12, 4];
function myFunction(item)
{
sum += item; demo.innerHTML = sum;
}
</script>
js中的forEach
原文地址：http://www.cnblogs.com/ZkbFighting/p/8047636.html