What's wrong with this Javascript Redirect Code???

by 10 replies
12
Can't get this to work... It's driving me crazy.... Do you see anything wrong?

<SCRIPT LANGUAGE="JavaScript">
var readCookie = getCookie("upgrade");

if (readCookie("upgrade") != null){
// if cookie already exists, go to url
document.location = "lesson1";
} else {
// else go someplace else
document.location = "lesson2";
};
</script>
#programming #code #javascript #redirect #wrong
  • you're looking for window.location, not document.location. Document.location is read-only in some browsers.

    And where is the getCookie function being defined? That isn't a standard function and will have to be supplied somewhere.
  • Here's the latest code someone else wrote to fix. Still isn't working though (no a getCookie function isn't defined. I thought that was built into javascript??? If you were to assign a var to = a cookie how would you do it?

    Anyway, latest code below (not working)
    Code:
    <script type = "text/javascript">
var readCookie = getCookie("upgrade");   // the cookie of that name must exist and returns the cookie value.
alert (readCookie);  // for testing
if (readCookie) {
//if cookie already exists, go to url
window.location = "lesson1";  // a file or URL
}
else {
// else go someplace else
window.location = "lesson2";
}
</script>
    • [1] reply
    • No, GetCookie() is not a built in javascript function. But try this it should work:
      Code:
      function getCookie(c_name)
{
if (document.cookie.length>0)
  {
  c_start=document.cookie.indexOf(c_name + "=");
  if (c_start!=-1)
    {
    c_start=c_start + c_name.length+1;
    c_end=document.cookie.indexOf(";",c_start);
    if (c_end==-1) c_end=document.cookie.length;
    return unescape(document.cookie.substring(c_start,c_end));
    }
  }
return "";
}
      Also, Lesson1 and Lesson2 have to be defined somewhere so the javascript knows where to redirect to.

      Dan
  • Some folks won't have javascript enabled. Have you considered doing this in another language?
    • [1] reply
    • The reason I'm doing it in javascript (and not PHP) is because I need to place it in Wordpress posts.

      Is there another language that would work within a wordpress post other then javascript?
  • Within all wordpress posts? You could add something to the single.php file...
  • That's the easiest way really - or add to your header if you want it to happen to every one no matter if they go to a page or tag or category page.
  • I need page by page cookie control and redirect. So editing the wordpress or template files isn't an option.

    Only other option I can imagine is with .htaccess ???
    • [1] reply
    • Code:
       
<script type = "text/javascript">
var readCookie = getCookie("upgrade");   // the cookie of that name must exist and returns the cookie value.
if (readCookie) 
{
 //if cookie already exists, go to url
 window.location = "lesson1";  // a file or URL
}
else 
{
 // else go someplace else
 window.location = "lesson2";
}
function getCookie(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;
}
</script>
      This set of code should work. It is similar to what danmart has suggested and works if javascript is enabled.

      You may want to consider creating a plugin in Wordpress that allows you to set the option of checking for "upgrade" in individual pages. When you enable the option for a particular page, Wordpress should then include a file that performs cookie checking for on the page.
  • Thanks Frank.
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