css文件：
.DataGridItem
{
behavior:url(../../CSS/DataGridItem.HTC);
line-height: 20px;
}
.DataGridItem_3
{
behavior:url(../../../CSS/DataGridItem.HTC);
line-height: 20px;
}
HTC文件：
<attach event="onmouseover" onevent="over()"/>
<attach event="onmouseout" onevent="out()"/>
<script language="Javascript">
function over(){
style.backgroundColor="#DAF0FD";
}
function out(){
style.backgroundColor="#FFFFFF";
}
</script>
DataGrid中加入
