openlayers 2 - Unable to see whole world map by decreasing panzoom bar?

I am seeing one weird thing in Openlayers today. I am unable to see whole map by using panzoombar, previously i used to.

this is the code, panzoombar is showing all the levels, but it stopped at last above two levels and not coming down.

Answer

i think this is all about div size. openlayers automatically makes its minimum zoom level to fit it to whole world map... and this does not seem as a problem.

it makes people that "you can see the whole world at this zoom level and i dont want you to see blank images with decreasing the level of zoom."

when width and height is 100% or 600px,400px:

it makes automatically min zoom level to : 3

when width: 200px and height: 400px :

it makes automatically min zoom level to : 1

you can test it with changing the div width and height...

i hope it helps you...