var obj = {
"JavaScript" : null,
"HTML" : null,
"CSS" : null
};
var list = document.getElementById('test-list');
var i = 0, len = list.children.length;
while (i < len) {
if (list.children[i].innerText in obj) {
i ++;
} else {
list.removeChild(list.children[i]);
len --;
}
}
山楂汉堡派
大概这样写比较好