[javascript] does not work IE frames

Hi

I have a problem with javascript and frames in IE.

I want to load the page with the script in one of the 2 frames.

The problem is that IE put about:blank in that frame instead of my page

The strange thing is, that I don't have this problem in Firefox

One other thing, the problem was created when I made the CloseMenu function

<script type="text/javascript" language="JavaScript">
function ChangeMenu(menuname)
{
    if(parent.wnavi.document.all(menuname).style.display=='none')
    {
        parent.wnavi.document.all(menuname).style.display=''
        this.CloseMenu(menuname)
    }
    else
    {
        parent.wnavi.document.all(menuname).style.display='none'
    }
}
function CloseMenu(menuname)
{
    var menulist=new Array(3)
    menulist[0]="submenu1"
    menulist[1]="submenu2"
    menulist[2]="submenu3"

    for (i = 0; i <= menulist.length; i++)
    {
        if((menuname)!=menulist[i]){parent.wnavi.document.all(menulist[i]).style.display='none'}
    }
}
</script>

Does anyone know what the problem is, and how to resolve this

you can find the files at http://members.home.nl/van.duijvendijk/ieprobleem/