用js给input传值

<style>
#name{ float:left; height:25px;*height:24px;margin-right:10px;}
#btn{ cursor:pointer; background:#a5a5a5; border:1px solid #666666;padding:1px 3px 3px 3px;float:left;}
#box{ border:1px solid #a5a5a5; background:#a5a5a5; width:144px; color:#000;*margin-top:-15px;*width:146px;}
#box ul{ list-style:none; padding:0;margin:0;}
#box li{ cursor: pointer;}
</style>
<script language="javascript">
function addLoadEvent(func){
	var oldonload = window.onload;
	if (typeof window.onload != 'function'){
		window.onload = func;
	}
	else {
		window.onload = function(){
			oldonload();
			func();
		}
	}
}

function text(value_text) {
    var get_value = "";
    value_text = value_text.childNodes;
    for ( var j = 0; j < value_text.length; j++ ) {
        get_value += value_text[j].nodeType != 1 ? value_text[j].nodeValue : text(value_text[j].childNodes);
    }
    return get_value;
}

function init(){
	var name=document.getElementById("name");
	var btn=document.getElementById("btn");
	var box=document.getElementById("box");
    btn.onclick=function(){
		box.style.display=box.style.display=="none"?"block":"none";
    }
    var data=box.getElementsByTagName("li");
    for(var i=0;i<data.length;i++){
    var currentObj=data[i];
    currentObj.onclick=function(){
        name.value=text(this);
    }
  }
}
addLoadEvent(init);
</script>

<input id="name" type="text"/> <div id="btn">click me</div>
<div style="clear:both"></div>
<div id="box" style="display:none">
	<ul>
		<li>one</li>
		<li>two</li>
		<li>three</li>
		<li>four</li>
		<li>five</li>
		<li>six</li>
	</ul>
</div>

 同样的效果用jquery来写就简单一些（这里你要先下载jquery库才能实现效果，附件中有提供）：

<style>
#name{ float:left; height:25px;*height:24px;margin-right:10px;}
#btn{ cursor:pointer; background:#a5a5a5; border:1px solid #666666;padding:1px 3px 3px 3px;float:left;}
#box{ border:1px solid #a5a5a5; background:#a5a5a5; width:144px; color:#000;*margin-top:-15px;*width:146px;}
#box ul{ list-style:none; padding:0;margin:0;}
#box li{ cursor: pointer;}
</style>
<script type="text/javascript" src="scripts/jquery-1.2.3.js"></script>
<script type="text/javascript">
$(document).ready(function() {
$("#btn").click(
       function(){
              $("#box").toggle();              
              $("#box li").each(
              function(i){
                            $(this).click(
                            function(){
                            $("#name").val(($(this).text()));
                            })
                            }
              )
       }
)
})
</script>

<input id="name" type="text"/> <div id="btn">click me</div>
<div style="clear:both"></div>
<div id="box" style="display:none">
	<ul>
		<li>one</li>
		<li>two</li>
		<li>three</li>
		<li>four</li>
		<li>five</li>
		<li>six</li>
	</ul>
</div>