为什么要这么设计呢?
有点怪
function foo()
{
var a = document.getElementsByName('fee[]');
var b = document.getElementsByName('fee1[]');
var c = document.getElementsByName('fee2[]');
var d ;
var e ;
for(var i=0;i<a.length;i++)
{
d = parseInt(b[i].value) ? parseInt(b[i].value) : '';
e = parseInt(c[i].value) ? parseInt(c[i].value) : '';
a[i].value = d+e;
}
}
<input name="fee1[]"><input name="fee2[]"><input name="fee[]" onClick="foo()">
<input name="fee1[]"><input name="fee2[]"><input name="fee[]" onClick="foo()">