求一个控件，请大家能为我介绍几个好网站

http://msdn.microsoft.com/msdnmag/issues/03/10/CuttingEdge/default.aspx

http://www.365mm.com/sort/150_1.htm
http://www.dapha.net/down/show.asp?classid=8&Nclassid=144
http://www.aspxcn.com/control/download.aspx
1.象那样的控件只有试用版，没有免费的那3.www.dbnetgird.com/dbnetgird/default.aspx
1、
DataGird模板列中在增加一个Table（2行），一行放主表的一列，另一行放一个DataGird绑定次表，实现展开用js ,例如：a.html<body onload="loadme()">
<table id=aa onclick="a()">
<tr style="cursor:hand;display:">
<td>aaaa</td>
</tr>
<tr style="cursor:hand;display:">
<td>bbbbbb</td>
</tr>
<tr style="cursor:hand;display:">
<td>aaaa</td>
</tr>
<tr style="cursor:hand;display:">
<td>bbbbbb</td>
</tr>
</table>
<script>
function loadme()
{
var x=document.getElementById("aa").rows.length-1;var i;
for(i=1;i<=x;i=i+2)
{
document.getElementById("aa").rows[i].style.display='none'
}}
function a()
{
e=event.srcElement
if(e.tagName=="TABLE") return
while(e.tagName!="TR")
e=e.parentElement
if(e.rowIndex==document.getElementById("aa").rows.length-1) return
document.getElementById("aa").rows[e.rowIndex+1].style.display=(document.getElementById("aa").rows[e.rowIndex+1].style.display=='none')?'':'none'
}
</script>
</body>
www.hvsoft.comhave a good webcontrol....