var _POPUP_FEATURES = 'location=1, statusbar=1, scrollbars=1, resizable=1, menubar=1, width=800, height=700';

function raw_popup(url, target, features) {
    // pops up a window containing url optionally named target, optionally having features
   // if (isUndefined(features)) features = _POPUP_FEATURES;
   // if (isUndefined(target  )) target   = '_blank';
    features=_POPUP_FEATURES;
	
	if (target == null) {
    	target='_blank';
	}
    var theWindow = window.open(url, target, features);
    theWindow.focus();
    return theWindow;
}

function link_popup(src, features) {
    // to be used in an html event handler as in: <a href="..." onclick="link_popup(this,...)" ...
    // pops up a window grabbing the url from the event source's href
    return raw_popup(src.getAttribute('href'), src.getAttribute('target') || '_blank', features);
}

function event_popup(e) {
    // to be passed as an event listener
    // pops up a window grabbing the url from the event source's href
    link_popup(e.currentTarget);
    e.preventDefault();
}

function event_popup_features(features) {
    // generates an event listener similar to event_popup, but allowing window features
    return function(e) { link_popup(e.currentTarget, features); e.preventDefault() }
}

window.onload = function () {
	elem = document.getElementById('swap');
	
	if (document.all) {
		elem.outerHTML = elem.innerHTML;
	}
};