@半路独行:
var input, filter, ul, li, a, i, isOutUl, isOutInput;// 声明变量
input = document.getElementById('myInput');//获取搜索框的输入值
ul = document.getElementById("myUL");//下拉框
li = ul.getElementsByTagName('li');
function myFunction() {
isOutInput = false;
isOutUl = false;
filter = input.value.toUpperCase();//将搜索框中的值转换成大写
// 循环所有列表，查找匹配项
for (i = 0; i < li.length; i++) {
a = li[i].getElementsByTagName("a")[0];//取得链接
if (a.innerHTML.toUpperCase().indexOf(filter) > -1 && filter != '') {
li[i].style.display = "";//如果是需要,则显示
ul.style.display = "";
} else {
li[i].style.display = "none";//否则，不显示
}
}
}
ul.onmouseleave = function () {
isOutUl = true;
leave(isOutUl);
}
input.onmouseleave = function () {
isOutInput = true;
leave(isOutInput);
}
var leave = function () {
if (isOutUl && isOutInput) { ul.style.display = "none" };
}
ul.onmouseenter = function () {
isOutUl = false;
}
input.onmouseenter = function () {
isOutInput = false;
}
var leave = function () {
setTimeout(function () {
if (isOutUl && isOutInput) { ul.style.display = "none" };
}, 50)
}
都改过来了呀