How can i include some certain jquery ui library in my page?

How can i include some certain jquery ui library in my page?

Hello there,

I want to include only some certain effects in my page. but when i put for example, the fallowing code in my head section, the drop and pulsate effects(for example), doesn't work... .
 
  <script src="js/jquery-1.4.4.min.js" type="text/javascript"></script>
  <script src="js/jquery.effects.drop.min.js" type="text/javascript"></script>
  <script src="js/jquery.effects.pulsate.min.js" type="text/javascript"></script>


but when i put 

<script src="js/jquery-ui-1.8.9.custom.js" type="text/javascript"></script>

the drop and pulsate effects works correctly. I want to include my only jquery.effects.drop.min.js and jquery.effects.pulsate.min.js in my page, because i don't need extra effects and ui that jquery-ui-1.8.9.custom.js has them... .

In other word, when i used an effect like fade,drop,pulsate ... in my codes, which one libraries should be add ?

thanks.