Hi I have problems to accommodate my table of contents in word.

1 Intorduction...................................... .................................................5
1.1 Intorduction into topic............................................. .........................5
1.2 Motivation und objective target............................................ ..............6
1.3 Structure of the work.............................................. .........................7

The first item is given in my document. I want to create further sub-items. The problem is that the page numbers 5 in 1st and 2nd line and 6 and 7 at the right side are not straight lined.
My question: Is there any function to create the dots after "topic", "target", "work" automatically that the page numbers at the end of every line are straight lined?

Thanks in Advance

Br
Ugur