<li class="nav-main-search">
<form action="search.jsp" method="get" role="search">
<div class="search-wrap">
<label for="main-q" class="offscreen"></label> <input
type="search" id="main-q" name="q" placeholder="搜索课程,视频" /> <a
class="search-trigger" href="javascript:;"><i
class="iconfont icon-magnifier"></i></a>
<button type="submit" class="offscreen">Search</button>
</div>
</form>
</li>
<script>
/**
* 站内搜索
*/
(function() {
var $nav = $("#navbar");
var $navItems = $nav.children().eq(0);
var $mainNavSearch = $nav.find(".nav-main-search");
var $searchWrap = $nav.find(".search-wrap");
var $searchTrigger = $searchWrap.find(".search-trigger");
var $input = $searchWrap.find("input");
var $form = $mainNavSearch.find("form");
$form.on("submit", function(e) {
e.preventDefault();
if (0 == $.trim($(this).find("input").val()).length) {
alert("搜索关键词不能为空");
return false;
}
this.submit();
});
$searchTrigger.on("click", function(e) {
if ($navItems.css("display") !== "none") {
$input.get(0).focus();
} else {
// 搜索框打开状态
$form.submit();
}
});
var timeout = null;
var createExpander = function(isAdd) {
return function(e) {
if (isAdd) {
$input.select();
}
// if ($mainNavSearch.css("display") === "block") {return;}
if (e)
e.preventDefault();
if (timeout)
clearTimeout(timeout);
timeout = setTimeout(function() {
if (isAdd) {
$navItems.fadeOut(100, function() {
$navItems.css("display", "none");
$searchWrap.addClass("expanded");
$nav.addClass("expand");
})
} else {
$nav.removeClass("expand");
timeout = setTimeout(function() {
$searchWrap.removeClass("expanded");
$navItems.fadeIn(400);
}, 250)
}
});
}
};
$input.on("focus", createExpander(true)).on("blur", createExpander())
$input.on("keydown", function(e) {
e = e || window.event;
if (e.keyCode === 13) {
$form.submit();
}
});
}).call();
</script>
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