I'm using 1.3.3 and the scrollTo method of datagrid is not working at all.

my source code is

Code:

function reloadGrid() {
    $('#dg').datagrid('scrollTo', 18);
}

the 'dg' is datagrid id and pagesize is 20. but nothing happens when I click the reload button to call reloadGrid().
Did i use this method wrong?

[So my question is how do I get which button is selected in the two button groups?]

I'm new to javascript and easyui and I run into this little problem when using easyui to build some webpages.
I wanna use the  Button Group extended from linkbutton.
and the code is like this:

^{<a href="javascript:void(0)" class="easyui-linkbutton" data-options="toggle:true,group:'g1',plain:true" iconCls="icon-redo" onclick="someMethod()" id="g1left">toggle1</a>
            <a href="javascript:void(0)" class="easyui-linkbutton" data-options="toggle:true,group:'g1',plain:true" iconCls="icon-undo" onclick="someMethod(2)" id="g1right">toggle2</a>
            <a href="javascript:void(0)" class="easyui-linkbutton" data-options="toggle:true,group:'g2',plain:true" iconCls="icon-redo" onclick="someMethod(3)" id="g2left">toggle3</a>
            <a href="javascript:void(0)" class="easyui-linkbutton" data-options="toggle:true,group:'g2',plain:true" iconCls="icon-undo" onclick="someMethod(4)" id="g2right">toggle4</a>}



and what i wanna do is, when click different button, I can filter different data to the datagrid.
So my question is how do I get which button is selected in the two button groups?
I tried some js code and they didn't work.