PHP and HTML Questions

I have 2 questions which pretty much have nothing to do with each other...

first the html one...How do I link something in a higher directory without using the full url, ie: i'm in the /one/two directory, and i wanted to link something in the /one directory. How would i do that without having to type in the full url or is that just impossible?

second, for the php question, i think it'll probably be a fuction, but i'm getting information from a form and i want to make sure its a integer, so what can i use to make sure it is?

Hey Hey...

Not too sure on the first one, depends on a lot of things prolly but you should beable to do ../<file>

For the second one you want to use the php is_int function.
if (is_int(1234324)) {
print "true";
} else {
print "false";
}

ok thanks, that helped, and on the first quesiton, i'm thinking it just cant be done...

Code:

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One

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if done from page two should get you to the parent directory like HTRegz vaguely stated. It should work, it works on my servers apache on MacOS X and on Mandrake.

I'm getting more and more interested in PHP..., I think it is the increased liesure time attributed to un-employment/no income, and the general dislike of my current websites static nature that would have be edit 30 - 40 files to get something that when printed out takes up 15 pages and contains oh so many typos and errors but is to hard to edit.

ciao,
Dhej