function getHeight() {
	var newHeight = document.getElementById("body").offsetHeight - document.getElementById("top_panel").offsetHeight;
	var realHeight = newHeight + 'px';
	document.getElementById('frame_bor').style.height = realHeight;
}

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;
}