js获取input标签的输入值实现代码

<% 
Date d = new Date(); 
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd"); 
%><% 
UserInfo userInfo = (UserInfo) session.getAttribute(ToftConst.Toft_SessionKey_UserData); 
%> 

<t:searchform id="searchForm"> 
<ul class="c3 l120 clearfix"> 
<li> 
<label>生成日期：</label> 
<t:date name="generate_date" id="generate_date" value="<%=sdf.format(d)%>"/> 
</li> 
<li> 
<label>维护人：</label> 
<input type="text" name="maintenance_men" maxlength="50" value="${userinfo.userName }"/> 
</li> 
</ul> 
</t:searchform> <script type="text/javascript"> 
function InsertData(){ 
var generate_date=document.getElementById("generate_date").value; 
var maintenance_men=document.getElementById("maintenance_men").value; 
alert(maintenance_men); 

</script>