var _iframe_content;
var _table_progress;

function pageLoad() {
    _iframe_content = $get('iframe_content');
    _table_progress = $get('table_progress');
}

function NavigateTo(url) {
    _iframe_content.setAttribute('src', url);
}

function ProgressNavigateTo(url) {
    ShowProgress();
    _iframe_content.setAttribute('src', url);
}

function ShowProgress() {
    _table_progress.style.visibility = 'visible';
}

function HideProgress() {
    _table_progress.style.visibility = 'hidden';
}