Fetch table value in BEX Web report using Javascripts, and assign condition

Question

Hi Gurus,
I am currently using WAD 3.5. I need to change the web report to behave like below :-
1. Default layout (Field A B C) with condition A & B activated.
2. If the drilldown Field B and C is removed, leaving only field B alone in the report drilldown, deactivate condition A & B, Activate condition C & D.
3. the above can be reversed where user drilldown field B & C into the layout, the condition A & B need to then be activated back.
So I believe this can be done using Javascript. So my questions are below
1.) How do i fetch table value for the navigationblock ? with navigationblock i am able to know what are the columns are in the drilldown (i will not display free characteristics, so ignore this part). how do i read the content of NAVIGATIONBLOCK_1 as shown in following code? using javascript.
<P><object>
         <param name="OWNER" value="SAP_BW"/>
         <param name="CMD" value="GET_ITEM"/>
         <param name="NAME" value="NAVIGATIONBLOCK_1"/>
         <param name="ITEM_CLASS" value="CL_RSR_WWW_ITEM_NAV_BLOCK"/>
         <param name="DATA_PROVIDER" value="DATAPROVIDER_1"/>
         <param name="SHOW_FREE_CHARACTERISTICS" value=""/>
         <param name="SHOW_NAVIGATION_ICONS" value=""/>
         <param name="SHOW_FILTER_ICONS" value=""/>
         ITEM:            NAVIGATIONBLOCK_1
</object></P>
2.) After question 1.) is done, please advice how do i activate/deactivate the conditions? based on the fields found in above. Maybe I can use IF navigationblock_1 contain field A only, then set condition A & B , etc.
<p><object>
         <param name="OWNER" value="SAP_BW"/>
         <param name="CMD" value="GET_ITEM"/>
         <param name="NAME" value="CONDITIONLIST_1"/>
         <param name="ITEM_CLASS" value="CL_RSR_WWW_ITEM_CONDITION"/>
         <param name="DATA_PROVIDER" value="DATAPROVIDER_1"/>
         ITEM:            CONDITIONLIST_1
</object>
I would appreciate if we can solve Question 1 first before proceed to 2.)
Please advise. Thanks

Answer 1

Hi JTi,
what i have understood from your requirement is that you want to access the web item table_1 in javascript, you can get that as below:
Add
<span> 
tag before your web item and set its id to table.
<span id = "table">
<param name="OWNER" value="SAP_BW"/>
<param name="CMD" value="GET_ITEM"/>
<param name="NAME" value="TABLE_1"/>
<param name="ITEM_CLASS" value="CL_RSR_WWW_ITEM_GRID"/>
<param name="DATA_PROVIDER" value="DATAPROVIDER_1"/>
<param name="GENERATE_CAPTION" value=""/>
<param name="CAPTION" value="jezel"/>
<param name="ONLY_HIERARCHY_NAVIGATION" value="X"/>
<param name="BLOCK_SIZE" value="0"/>
<param name="SHOW_PAGING_AREA_BOTTOM" value=""/>
ITEM: TABLE_1
</span>
In javascript access it as :
var mytable = document.getElementsById("table");
Hope this helps
Thanks
Dipika