当我重新访问页面时，我的cookie无法正常工作

Question

When people type in my URL, I want them to click North Carolina or Virginia. After they click, it redirects them to either www.myurl.com/nc or www.myurl.com/va. After they answer that question, next time they visit my site, it will redirect them to the appropriate page without clicking NC or VA again. My links are working (taking me to the correct page) but when I return, the cookie is not redirecting me and i'm returning to the same page where I ask to choose the state. Here's what I've got so far. I feel like I'm close, but I honestly have no clue what I'm doing.

<p> Please tell us where you live so we can give you information for your location. </p>
<a href="#" onClick="window.location = 'http://www.myurl.com/nc'" value="nc">North Carolina</a><br />
<br />
<a href="#" onClick="window.location = 'http://www.myurl.com/va'" value="va">Virginia</a> 
<script type="text/javascript" src="script.js"></script> 
<script type="text/javascript">
function redirect(state) {     createCookie('state', state, 90);     window.location.href = "http://www.myurl.com/" + nc; } 
</script>

I also have this script in a separate file:

// JavaScript Document
function createCookie(name,value,days) {
    if (days) {
        var date = new Date();
        date.setTime(date.getTime()+(days*24*60*60*1000));
        var expires = "; expires="+date.toGMTString();
    }
    else var expires = "";
    document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
    var nameEQ = name + "=";
    var ca = document.cookie.split(';');
    for(var i=0;i < ca.length;i++) {
        var c = ca[i];
        while (c.charAt(0)==' ') c = c.substring(1,c.length);
        if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
    }
    return null;
}

function eraseCookie(name) {
    createCookie(name,"",-1);
}

Answer 1

Try this:

<p> Please tell us where you live so we can give you information for your location. </p>
<a href="#" onClick="redirect('nc');return false" >North Carolina</a><br />
<br />
<a href="#" onClick="redirect('va');return false" >Virginia</a> 
<script type="text/javascript" src="script.js"></script> 
<script type="text/javascript">
function redirect(state) {
    createCookie('state', state, 90);
    window.location.href = "http://www.myurl.com/" + state; 
}
var cookie = readCookie('state');
if (cookie != null) {
    window.location.href = "http://www.myurl.com/" + cookie;
}
</script>

jsfiddle: http://jsfiddle.net/7j8pG/1/