"why Is Our Website Not Present All Over The Browser"
When we started designing websites a long time ago
, monitor sizes varied largely. Several people were still on 15? CRT monitors specially in the corporate arena. Few people, especially those good at negotiating had snared 17? or 19? LCD monitors for a few thousand dollars.
As monitors advanced with time it became quite hard to find out the best way to display sites and we generally made sites span 100% width.
At the present time, however, the monitor size race has settled down a little and most people have come to a decision that a 19-21? flat screen is about right.
As we know several people have around the exact same size monitor thus there is no real necessity to span websites 100% width. There are allied demerits as well- the major one being you lose the ability of placing things in the very same position with regard to each other as the page stretches and therefore the site will always look a little different on every different monitor. The other is sites with a lot to read would be really hard to read if they stretched the complete width. Imagine having a truly wide book - there is a reason majority of the books and e-readers are about the exact same size - this is for the reason that it is fairly hard to read very long lines of text.
With fixed width websites, sites will all the times look exactly the same only dissimilarity being some websites will have a bit more space down either side.
We develop all of our websites at around 1000px wide. This suggests that they will display on a 17 monitor without horizontal scrolling. On a 19 monitor there is a small amount of white space on both the sides. On bigger monitors there is extra white space (or space for a type of non critical graphical element) but people with bigger monitors normally don't have browsers at the full width or they are used to having spare space at the ends.
In fact 1000px fixed width design has become quite standard. If you check out all of the following leading websites they are all fixed with - around 1000px.
youtube.com
facebook.com
twitter.com (it's in fact a fair bit below 1000px)
ebay.com
cnet.com
news.com.au
realestate.com.au
And the list goes on.
At times we do come across main sites with variable width interfaces like amazon.com. I guess they figure the more real estate they use up the more products they will sell and it seems like they have gone to some lengths to make certain it appears quite consistent on several different size monitors. For the major part however having 1000px fixed width has turned out to be quite standard.