Can only read javascript cookie with .net in directory it was created?

I have a cookie set on landing page with javascript like below:

...

setCookie('cSizeSpeed', speedsize, 1);
...

   function setCookie(c_name, value, exdays) {
        var exdate = new Date();
        exdate.setDate(exdate.getDate() + exdays);
        var c_value = escape(value) + ((exdays == null) ? "" : "; expires=" + exdate.toUTCString());
        document.cookie = c_name + "=" + c_value;
    }

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I can read it on the next page using this vb code, but only if that page is in the same directory where the javascript created it. How can I overcome this limitation?

       

   If Not IsNothing(Request.Cookies("cSizeSpeed")) Then
                strSpeedSize = Request.Cookies("cSizeSpeed").Value
        End If

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