Writing Cookies in Javascript.

[sreemathy2000]

I have a fully function webpage based on a Zipcode. I get the Zip code from the user once and write it the cookie and retrieve that everytime.

I also have another webpage which also asks for the zip code.

I have to synchronize these two. What i have done for this i accept the zip code also as querystrig parameter.
So from 1 website when i enter the zip code, in the javascript i have image tag and i calll the otherwebsite and load it internally.

if(document.images)    {    image1 = new Image();    image1.src ="http://mywebsite.com/default.aspx?zip=" + zipcode;    }

The Problem with this it writes only the cookie and doesn't load the webpage.

When i open the other wbsite i soem times see the cookie written and soem times i doesn't work.
So i'm not sure where the problem is.

Is there a better way of synchronizing the Zipcode values in both the websites.

[acoder]

Are the 'websites' from the same domain?

[sreemathy2000]

No they are not from the same domain. there are 2 independent websites. We are just trying to make the user enter the Zip code only once.

[acoder]

You could load the other website in an iframe or via Ajax (though you'd need a web proxy to avoid cross-domain issues).

The second website should have code to accept the zip parameter and write the cookie, so when you next visit the website the zipcode is set.

[sreemathy2000]

Thanks for the replies...Will try it out..

[acoder]

No problem, let us know if you hit any problems.

[sreemathy2000]

I implemented it using a iframe . It have a cookie in the main website which checks to see if the second website is loaded only once to avoid hit issues.

code is

function load() { var zipcode = getCookie('Zip'); if(zipcode) {     var IsCookie= setCookie('OnDemand');    if ((!IsCookie) || (Iscookie !=zipcode ))    {        document.write('<IFRAME SRC="http://myweebsitecom/zipcode.aspx?zip=' + twzipcode + '" WIDTH="0"HEIGHT="0"FRAMEBORDER="0"></IFRAME>');     var expdate = new Date(); expdate.setFullYear(expdate.getFullYear() + 1);    setCookie('OnDemand',zipcode,expdate);    }}}

But i'm facing a problem with this implementataion in IE.
The second website that i'm loading in the iframe has to be a trusted site to write the client side cookies which cannot be done.
How can a solution be arrived for this issue without give full trust to the website manually.

[acoder]

The second website that i'm loading in the iframe has to be a trusted site to write the client side cookies which cannot be done.
How can a solution be arrived for this issue without give full trust to the website manually.

What do you mean by a trusted site?

Why not have cookie writing code in the other site too? Once it's set there, it should be set when you next visit that site.

[sreemathy2000]

yes.there is a cookie written in the other site also. But only if we set the website as a trusted site, the website writes the cookie if loaded in iFrame. Otherwise, the client side cookies are not accepted by the browser.

We found a solution for this by making the other website use a P3P policy file for accepting client cookies . It works with IE7 , but it doesn't work with IE6.

[acoder]

That must be because of your browser settings. If you allow cookies for sites other than trusted ones, it should work.