Possible to change more than 3 frames at once?

[wxdqz]

I'm using this code to change 3 frames at the same time but would like to add a 4th. 3 works so far but not when I add a fourth. Is this possible or just better to completely reload the frameset and pass the vars in the url. I'm using php and many vars need to be passed in the url and it gets very intricate quickly.
the code:
<SCRIPT LANGUAGE="JavaScript">
function loadFrames(frame1,page1,frame2,page2,frame3,page3) {
eval("parent."+frame1+".location='"+page1+"'");
eval("parent."+frame2+".location='"+page2+"'");
eval("parent."+frame3+".location='"+page3+"'");
}
</script>

any help appreciated.
thanks