FormCalc: format border color for data in table

I am new in scripting language so I seek your patience if my question seems to be obvious.

I need to put different color (let say: red) to the bottom border/line for all lines of the data in a table.

My palette hierarchy looks like the following screen shot:

I have been trying with one column TANUM (i.e. TO No.) and put the following FormCalc script in the even "initialize":

var Reihen = data.Page1.Output_table.IT_OUTPUT._DATA.count-1

for i=0 upto Reihen do data.Page1.Output_table.IT_OUTPUT.DATA[i].TANUM.border.getElement("edge",2).color.value = "255,0,0"

endfor

When I run it does color the Column TANUM with the color Red, but only for thelast line of the data on the second

column (TANUM / TO No.) of each page, as seen below:

I am really desperate because I have tried with other events:

Validate, form:ready, layout:ready, docReady

but the result is always the same!

If I put the following script in the event Calculate :

data.Page1.Output_table.IT_OUTPUT.DATA.TANUM.border.getElement("edge",2).color.value = "255,0,0"

the effect for all lines can be seen, BUT the content of the column TANUM (To No.) is replaced by the numbers of the color coding!

So my question is: how can apply it to ALL lines of the data?

Thanks for your help in advance.

Regards,

Sunny