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dhtmlxgrid with inbuild filter

hi,
i am using dhtmlxgrid with filters in header as :

me.mygrid4.setImagePath("../dhtmlx/dhtmlxGrid/codebase/imgs/");
me.mygrid4.setHeader("IPAddress,NodeName,Time,Description");
me.mygrid4.setColAlign("center,center,center,left");
me.mygrid4.attachHeader("#select_filter_strict,#select_filter_strict,#select_filter_strict,#select_filter_strict");
me.mygrid4.setInitWidths("130,130,130,400");
me.mygrid4.setColTypes("ro,ro,,ro,ro");
me.mygrid4.setColSorting("str,str,str,str");
me.mygrid4.setSkin("light");
me.mygrid4.init();
me.mygrid4.setColumnHidden (5,true);

i am doing auto refresh as :

function autoRefreshAlarms() {
    ---------------
    genInfo.init();
    ---------------
    setTimeout ('autoRefreshAlarms ()', 5000);

}


aaaa.prototype.init = function () {

-- --------------------
-------------------------
me.mygrid.clearAll(false);
me.mygrid.loadXMLString(alarmString);
me.mygrid.refreshFilters ();
-----------------------
---------------------
}
My problem :
when i am filtering by ip address say 10.11.11.11, grid is filtered for ip-address 10.11.11.11 , but when auto-refresh is called filter got cleared , and grid shows whole data (with all ips).
is there any way to set filter on some value and after loading grid with whole value it should show only filter (ip = 10.11.11.11) value.

After loading new items in grid you can filter it using mygrid.filterByAll() method
aaaa.prototype.init = function () { 

-- -------------------- 
------------------------- 
me.mygrid.clearAll(false); 
me.mygrid.loadXMLString(alarmString); 
me.mygrid.refreshFilters (); 
me.mygrid.getFilterElement(0).value="10.11.11.11";
me.mygrid.filterByAll();
----------------------- 
--------------------- 
}