stack overflow error

I still have the same problem, I could not fix.

dhtmlx.skin = “dhx_skyblue”;
var c = new dhtmlXCombo(“comboTecnico”, “alfa2”, 200);
var d = new dhtmlXCombo(“comboAlmacen”, “alfa2”, 200);
c.loadXML(“ajax/comboTecnico.php”);
d.loadXML(“ajax/comboAlmacen.php”);
c.enableFilteringMode(true);
d.enableFilteringMode(true);
c.attachEvent(“onSelectionChange”,asignaTecnico);
c.attachEvent(“onSelectionChange”,asignaAlmacen);
function asignaTecnico(){
d.selectOption(d.getIndexByValue(c.getSelectedValue()),false,false);
}
function asignaAlmacen(){
c.selectOption(c.getIndexByValue(d.getSelectedValue()),false,false);
return true;
}

stay in a loop, someone please help me
regards.-

selectOption calls onSelectionChange event. Try using onChange event instead of onSelectionChange.