Problem with loading variables using GET method

I declare variable in html like this:

Code:

---

<param name="movie" value="movie.swf?clickTag=http://site.com">
...
<embed src="movie.swf?clickTag=http://site.com"

---

In 3DFA 4 Release 6 was simply to get variable clickTag - in my button I was adding a script to "Button up" action:

Code:

---

postURL(clickTag, '_blank');

---

I tried this in 3DFA 4.9.8 but not working. I tried also:

Code:

---

getURL(clickTag, "_blank");

---

or

Code:

---

getURL(_root.clickTag, "_blank");

---

- but still not working...

How to get variable from html using GET method?