function loadIframe(iframeName, url)
{
	if ( window.frames[iframeName] )
	{
        window.frames[iframeName].location = url;   
        return false;
    }
    return true;
}

function changeIframeSrc(id, url)
{
    if (!document.getElementById) return;
    var el = document.getElementById(id);
    if (el && el.src)
	{
        el.src = url;
        return false;
    }
    return true;
}