Excel 2007 : how to drawing graph with 3 variable (x, y1, y2) by exel

hi
im gonna draw a graph containe 3 variables , x , y1 , y2
i have one x and two y's , can i draw a graph like that by excel ?
there are two graphs that i want combine them:
http://8201.1.img98.net/out.php/i133521_untitled.jpg

i want something like this :

http://8201.1.img98.net/out.php/i133...kviewchart.png

im not sure if excel is able to do that, if not plz introduce other software, thank you very much