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JavaScript: How to Work With Cookies (Part 3)

Retrieving a Cookie

The code to retrieve a cookie is a little more complicated, because you have to scroll through all cookies to find yours. Here is the JavaScript getCookie function:

<script language="JavaScript">

function getCookie (name) {
    var dc = document.cookie;
    var cname = name + "=";

    if (dc.length > 0) {
      begin = dc.indexOf(cname);
      if (begin != -1) {
        begin += cname.length;
        end = dc.indexOf(";" begin);
        if (end == -1) end = dc.length;
        return unescape(dc.substring(begin, end));
        }
      }
    return null;
}
</script>

Let’s retrieve the cookie we just set and display the value in a text box:

The HTML to retrieve the value of myCookie (the cookie we just set) is:

<form>
<input type="button" value="Get Cookie Value" onClick="this.form.tf.value = getCookie('myCookie')">
<input type="text" name="tf" size="30">
</form>

Special thanks to Brig at IntoText.com for pointing out and offering a fix for my typo in the getCookie function above.

Next >> Deleting a Cookie

 

Related Links:

    Cookie Central -- a site devoted completely to information about cookies.

 

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