<div class="contracts-header">名称: <input type="text" value="" id="search_contract_name"></div>
<div class="contracts-header">代码: <input type="text" value="" id="search_contract_code" placeholder="不区分大小写"></div>
<div class="contracts-header"><button onclick="search()">查找</button></div>
<div id="contracts-list">
  <ul>
  <li><input type="checkbox" name="contract[]" value="code|name" /><span>name(code)</span></li>
  <li><input type="checkbox" name="contract[]" value="code|name" /><span>name(code)</span></li>
  </ul>
</div>

function search()
{
  var search_contract_name = $("#search_contract_name").val();
  var search_contract_code = $("#search_contract_code").val();
  if (search_contract_name && search_contract_code) { //两个输入框都有值
    search_contract_code = search_contract_code.toLowerCase(); //不区分大小写, 全部转换为小写, 下同
    $("input[name='contract[]']").each(
        function () {
          var code_name = this.value;
          var search_code = code_name.toLowerCase().indexOf(search_contract_code); 
          var search_name = code_name.toLowerCase().indexOf(search_contract_name);
          if (search_code >=0 && search_name >=0 ) {
            // this.nextSibling.style.backgroundColor = "#FFDEAD"; //高亮匹配到的
            this.parentNode.style.display = 'block';
          } else {
            // this.nextSibling.style.backgroundColor = "";
            this.parentNode.style.display = 'none'; //隐藏不匹配的
          }
        }
    );
  } else if(search_contract_name || search_contract_code) { //只有一个输入框有值
    search_contract_name = search_contract_name.length ? search_contract_name : 'xxx'; //默认为xxx是因为不可能存在xxx
    search_contract_code = search_contract_code.length ? search_contract_code.toLowerCase() : 'xxx';
    $("input[name='contract[]']").each(
      function () {
        var code_name = this.value;
        var search_code = code_name.toLowerCase().indexOf(search_contract_code);
        var search_name = code_name.toLowerCase().indexOf(search_contract_name);
        if (search_code >=0 || search_name >=0 ) {
          // this.nextSibling.style.backgroundColor = "#FFDEAD";
          this.parentNode.style.display = 'block';
        } else {
          // this.nextSibling.style.backgroundColor = "";
          this.parentNode.style.display = 'none';
        }
      }
    );
  }
}