问如何实现jQuery Search功能

EN

<div class="searchOption">
    <input type="text" id="search" placeholder="search"> 
</div>
<div class="searchFound">
    <!--upon hitting enter, this div opens collapse. -->
</div>

    /*Need to get the below search code working...*/
    var thePage = $(".pageContainer");
    $("#search").keyup(function(){
        var input = $(this).val();
        console.log(input);
        //if match found, make corresponding div link appear in open collapsible div,
        // else say nothing found in open collapsible div
        thePage.each(function(index, value){
            var foundText = $(this).text().toLowerCase();
            $(value).toggle(foundText.indexOf(input) >= 0);
        });
    });