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home > javascript / ajax / dhtml > javascript / ajax / dhtml questions

A script to check the URL of the current page...

P: n/a

*********@*****.***

Alright, I know this must be incredibly simple, but my knowledge of

JavaScript is rather basic, and what I've learned in the past I learned

for highly specific situations, so I don't have a clear working

knowledge of it.

I'm looking to make a simple script that will check the location typed

into the user's address bar and if it contains a certain domain name it

will call a function (not sure what yet... maybe add text to the page,

maybe create an alert, maybe an alert and a redirect). The main

concept is to direct people to my new domain name even though I'm

hosting it as a mirror so I can let my old domain name lapse.

So... any suggestions on how to do this? Odds are it's incredibly

simple, but my brain just isn't latching onto the language right now.

Thanks,

TurboFool

Jan 10 '06 #1

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11 Replies

P: n/a

Sanjay

I guess you can do this.

if ("MY_OLD_DOMAIN".indexOf(location.host) != -1 )

{

//redirect to your new domain.

}

Thanks

Sanjay

Jan 10 '06 #2

P: n/a

Thomas 'PointedEars' Lahn

Sanjay wrote:

[color=blue]

> I guess you can do this.

> if ("MY_OLD_DOMAIN".indexOf(location.host) != -1 )

> {

> //redirect to your new domain.

> }[/color]

It makes more sense the other way around because "MY_OLD_DOMAIN"

is what you are looking for in location.host, not vice-versa:

if (location.host.indexOf("MY_OLD_DOMAIN") != -1)

{

// redirect to your new domain.

}

But remember:

PointedEars

Jan 10 '06 #3

P: n/a

*********@*****.***

Thomas 'PointedEars' Lahn wrote:[color=blue]

> It makes more sense the other way around because "MY_OLD_DOMAIN"

> is what you are looking for in location.host, not vice-versa:

> if (location.host.indexOf("MY_OLD_DOMAIN") != -1)

> {

> // redirect to your new domain.

> }

> But remember: [/color]

Well, I'd be more likely to make this script either add a text link to

the page notifying them of the change, or create an alert that takes

them to the new page when they hit the OK button.

Any suggestions on the best way to implement the latter, especially a

script that I wouldn't have to custom code the address of for every

page in my site (in otherwords if they access my.old.domain/resume.html

the script would automatically take them to my.new.domain/resume.html

or whatever other address they accessed)? I know I'm getting deep here

and I may just settle for the script you provided (thank you very much,

both of you), but prhaps there's something relatively simple?

Jan 10 '06 #4

P: n/a

*********@*****.***

Never mind. I added this to the script:

top.location="my.new.domain" + top.location.pathname;

Worked like a charm. Thanks for the assist.

Jan 10 '06 #5

P: n/a

*********@*****.*** wrote:[color=blue]

> Any suggestions on the best way to implement the latter, especially a

> script that I wouldn't have to custom code the address of for every

> page in my site (in otherwords if they access my.old.domain/resume.html

> the script would automatically take them to my.new.domain/resume.html

> or whatever other address they accessed)? I know I'm getting deep here

> and I may just settle for the script you provided (thank you very much,

> both of you), but prhaps there's something relatively simple?[/color]

Hi there!

I just purchased a new domain, so please

update your bookmarks if needed.

If your browser will not redirect you

automatically in a few seconds, please follow

this link

:-D

Jan 10 '06 #6

P: n/a

*********@*****.***

Thanks VK, but not that simple. My two domain names are going to

simply mirror my server until it dies because too many different pages

within my site are in search engines or links from other sites, so I

don't want to lose the traffic. That's why I was looking for a script

that could check and see which domain name they accessed it from and

then notify them and redirect. Anyway, I managed with a combination of

Sanjay/Thomas's scripts and a little bit of my own thinking to get it

working. Thanks, all!

Jan 10 '06 #7

P: n/a

Sanjay

Thomas 'PointedEars' Lahn wrote:

[color=blue]

> It makes more sense the other way around because "MY_OLD_DOMAIN"

> is what you are looking for in location.host, not vice-versa:

> if (location.host.indexOf("MY_OLD_DOMAIN") != -1)

> {

> // redirect to your new domain.

> }[/color]

Well its a normal programming habit of mine to put the string contant

first to avoid any null pointer exceptions in java.

Second I remember seeing an exception thrown by IE browser when I did

local.search.indexOf saying "for security this operation not allowed"

or something similar.

I cannot guarantee that I can reproduce, but is there such a

restriction.

Jan 11 '06 #8

P: n/a

Sanjay

[color=blue]

>Sanjay wrote:

> Well its a normal programming habit of mine to put the string contant

> first to avoid any null pointer exceptions in java.

> Second I remember seeing an exception thrown by IE browser when I did

> local.search.indexOf saying "for security this operation not allowed"[/color]

Oops its location.search.

Jan 11 '06 #9

P: n/a

Thomas 'PointedEars' Lahn

Sanjay wrote:

[color=blue]

> Thomas 'PointedEars' Lahn wrote:[color=green]

>> It makes more sense the other way around because "MY_OLD_DOMAIN"

>> is what you are looking for in location.host, not vice-versa:

>> if (location.host.indexOf("MY_OLD_DOMAIN") != -1)

>> {

>> // redirect to your new domain.

>> }[/color]

> Well its a normal programming habit of mine to put the string contant

> first to avoid any null pointer exceptions in java.[/color]

You have not understood that the order in which you use the parameters

affects the semantics of the expression.

"MY_OLD_DOMAIN".indexOf(location.host) != -1

could evaluate not only to

"MY_OLD_DOMAIN".indexOf("MY_OLD_DOMAIN") != -1

which would evaluate to `true', but also to

"MY_OLD_DOMAIN".indexOf("foo.MY_OLD_DOMAIN") != -1

which will _never_ evaluate to `true' even if this is the same second-level

domain. But if you want only equality to evaluate to `true', as in

if ("MY_OLD_DOMAIN".indexOf(location.host) != -1)

then there is no need for String.prototype.indexOf anyway:

if (location.host == "MY_OLD_DOMAIN")

Second, Java != JavaScript. There are no NullPointerExceptions in

JS/ECMAScript, there are no pointers at all.

PointedEars

Jan 11 '06 #10

P: n/a

Sanjay

Ha ha a good one.

Jan 11 '06 #11

P: n/a

Thomas 'PointedEars' Lahn

Sanjay wrote:

[color=blue]

> Ha ha a good one.[/color]

If you do not have something intelligent to say, you should just shut up.

Unless you deliberately try to make a fool of yourself, of course.

PointedEars

Jan 11 '06 #12

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