<input type = "text" name="keyword" id="keyword" onkeydown="entersearch()"/>

// onclick事件 
function search(){ 
    var $keyword = $("#keyword").val(); 
    window.location.href = "/index/"+?keywords=$keyword; 
} 
   
// 按Enter鍵,執(zhí)行事件 
function entersearch(){ 
    var event = window.event || arguments.callee.caller.arguments[0]; 
    if (event.keyCode == 13) 
       { 
          search(); 
       } 
}