打开页面光标自动定位

<div class="search">
                <input type="search" class="search-input input_search_key" placeholder="搜索" id="in" style="padding-left:1.5rem;padding-right: 1rem;">
               <span id="ospan" style="font-size:20px; position: absolute; margin:0.3rem -1.3rem; cursor: pointer" onclick="clearInput()">×</span>
                <a class="search-cancel" href="questionA.html">取消</a>
                 <div class="search_suggest " id="gov_search_suggest">
                 <ul>
                 </ul>
                 </div>
            </div>

   $(document).ready(function () {
            $("#in").focus();
        });       

        function clearInput() {
            document.getElementById(‘in‘).value = ‘‘;
        }