php+ajax实时获取下拉数据程序代码

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />  
ajax实时获取下拉数据

  
<script type="text/javascript">// <![CDATA[  
var funjieliu = function(fn, delay){//函数节流  add by shanmao 2013 - 1 - 18  
    var timer = null;  
    return function(){  
        var context = this, args = arguments;  
        clearTimeout(timer);  
        timer = setTimeout(function(){  
            fn.apply(context, args);  
        }, delay);  
    };  
 };  
document.getElementById("tla").onkeyup=funjieliu(function(){//键盘按下的时候  
    var tla = $("#tla").val();  
    if(tla){  
        $.post("/cityosweb/default.php/shanmao/input_xiala",{tla:tla},function(data){  
            if(data.status==1){  
                $(".inul").html("");  
                $.each(data.data,function(index,val){  
                    $(".inul").append("  
                        <li>"+val.username+"</li>  
   
                        ");  
                    });  
            }  
            },"json");  
        }  
    },500);  
$(function(){  
    $(".inul li").live("click",function(){  
        var thval = $(this).html();  
        var tla = $("#tla").val();  
        var regexp = new RegExp(",");  
        if(regexp.test(tla)){//如果input有值（","）则加上input里面的值  
        $("#tla").val(tla+thval+",");  
            }else{  
        $("#tla").val(thval+",");  
                }  
        $(".inul").html("");  
        $("#tla").focus();  
        });  
    });  
// ]]></script>

<?php
function input_xiala(){  
    $input = new input();  
    $tval = $input->post(&#39;tla&#39;);  
    $u = M(&#39;User&#39;);  
    if(strpos($tval,",")){//检查是否带有","  
        $val = explode(",",$tval);//拆分成数组  
        $tval = end($val);//数组的最后一个值  
        }  
    $re = $u->field(&#39;username,email&#39;)->where("username like &#39;$tval%&#39;")->limit(10)->select();  
    $this->ajaxReturn($re,&#39;success&#39;,1);  
    }
?>