disabling a item renderer

[purni]

hi all,

i m facing some prob again with my item renderers........ i
kept a button as my renderer..... i need to make it disable on 'tree
change'.......

here is my code for data grid............ some one help me
soon,,,,,,,,,

this code is not working properly..... the renderes are made disable
at some time and not at some time.. also it is made disable in one of
my rows and not in another row.......
<mx:Script>
<![CDATA[
public var renderer_flag:int=0;

]]>
</mx:Script>

<mx:DataGrid x="10" y="71" height="126" id="dataGrid"
editable="true">
<mx:columns>

<mx:DataGridColumn headerText="Group" dataField="group"
width="90" editable="true"/>

<mx:DataGridColumn headerText="Transition"
dataField="transition" width="150" editable="false"/>

<mx:DataGridColumn headerText="" dataField="col3" width="150"
editable="false">

<mx:itemRenderer>


<mx:Component>

<mx:HBox>

<mx:Script>

<![CDATA[

import mx.controls.Alert;


public function set_edit_1():void{


if (outerDocument.renderer_flag_1==0)

{
//
Alert.show("button set visible");

render_edit.enabled=true;

}

else if(outerDocument.renderer_flag_1==1)

{
//
Alert.show("button set INvisible");

render_edit.enabled=false;

}
}


public function set_del():void{


if(outerDocument.renderer_flag_1==0){

render_delete.enabled=true;
}

else if(outerDocument.renderer_flag_1==1){

render_delete.enabled=false;
}
}
]]>
</
mx:Script>


<mx:Button label="edit" width="50"
click="outerDocument.PopUp(event)" id="render_edit"
creationComplete="set_edit_1()"/>

<mx:Button label="delete" width="65"
click="outerDocument.getDetails('0')" id="render_delete"
creationComplete="set_del()"/>

</
mx:HBox>

</
mx:Component>
</
mx:itemRenderer>
</
mx:DataGridColumn>
</mx:columns>
</mx:DataGrid>
<mx:Label x="10" y="45" text="Plan Group
Table" width="302"
fontWeight="bold" id="lbl"/>
<mx:Button x="10" y="221" label="Add Group"
click="addGroup(event)"
id="btn0"/>
<mx:DataGrid x="10" y="287" width="413"
editable="true" id="dg"
height="100" click="selectedField(event)">
<mx:columns>
<mx:DataGridColumn
headerText="Transition" dataField="Transition"
editable="false" />
<mx:DataGridColumn
headerText="Group" dataField="Group"
editable="false"/>
<mx:DataGridColumn
headerText=" " dataField="col3" width="150"
editable="false">
<mx:itemRenderer>
<mx:Component>
<mx:HBox>
<mx:Script>
<![CDATA[
import
mx.controls.Alert;


public function set_edit():void{


if (outerDocument.renderer_flag==0)

{
//
Alert.show("button set visible");

render_edit_1.enabled=true;

}

else if(outerDocument.renderer_flag==1)

{
//
Alert.show("button set INvisible");

render_edit_1.enabled=false;

}

}


public function set_del():void{

if(outerDocument.renderer_flag==0){

render_delete_1.enabled=true;
}

else if(outerDocument.renderer_flag==1){

render_delete_1.enabled=false;
}
}
]]>
</mx:Script>
<mx:Button
label="edit" width="65"
click="outerDocument.PopUp1(event)" id="render_edit_1"
creationComplete="set_edit()"/>
<mx:Button
label="delete" width="65"
click="outerDocument.getDetails('3')" id="render_delete_1"
creationComplete="set_del()"/>
</mx:HBox>
</mx:Component>
</mx:itemRenderer>
</mx:DataGridColumn>
</mx:columns>

</mx:DataGrid>

i set tat flag =1 at my tree change function........

please help me so soon......
Thanks in advance...........