/*___________________________________________________________________________________________________________________

	mediaCT webinterieur - www.mediact.nl - info@mediact.nl - 050 5799393 - Groningen - The Netherlands
	copyright: http://creativecommons.org/licenses/by-nc-nd/2.0/deed.nl

_____________________________________________________________________________________________________________________*/

// the functions in this file require the supplementary library lib.js

// These defaults should be changed the way it best fits your site
var winLeft 		= (screen.width - 1016) / 2;
var winTop 			= (screen.height - 610) / 2;
var _POPUP_FEATURES = 'location=0,statusbar=0,menubar=0,width=1016,height=610,left='+winLeft+',top='+winTop;

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 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() }
}