How to locate the iphone safari?

There is a web site to support the iphone safari.
Sometimes the system will pop up some tips in the pc, then this information is in the middle of the screen, but there is no scroll bar iphone, unable to locate, is there any way to locate the center of the screen, so that these pop-up messages are displayed in the middle of the screen?
Reply:
The screen is so small, you put it over the edge
320 × 480
Reply:
iphone browser scroll bar, the page loads a bit slow, it may not appear card

Reply:

cited a floor ybh37 reply:

screen is so small, you put it over the edge
320 × 480

It is placed on the top left of the page, if the page is very wide, then, to pull a long to see that message.

On the edge of the screen can also, how to find the edge of it?
Reply:

reference to the second floor ybh37 reply:

iphone browser scroll bar, the page loads a bit slow, it may not appear card

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Oh say iphone-safari?
Reply:
There is a Cydia plugin can do