var _POPUP_FEATURES = 'location=0,statusbar=0,menubar=0,scrollbars=1,width=400,height=300';
		
function isUndefined(v) 
{
    var undef;
    return v===undef;
}

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';
    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 popitup(url)
{
	newwindow=window.open(url,'name','height=560,width=550,resizable,scrollbars');
	if (window.focus) {newwindow.focus()}
	return false;
}

function popitupwide(url)
{
	newwindow=window.open(url,'name','height=600,width=800,resizable,scrollbars');
	if (window.focus) {newwindow.focus()}
	return false;
}