var _POPUP_FEATURES = 'location=0,statusbar=0,menubar=0,scrollbars=1,resizable=1,width=640,height=800';

var _POPUP_FEATURES_WITH_SIZE = 'location=0,statusbar=0,menubar=0,scrollbars=1,resizable=1';

function raw_popup(url, target, features) {
    var theWindow = window.open(url, target, features);
    theWindow.focus();
    return theWindow;
}
	
function link_popup(src, features) {
    return raw_popup(src, '_blank', features);
}

function link_popup_with_size(src, features, width, height){
	
	var features_with_size = features + ',width=' + width + ',height=' + height;

    return raw_popup(src, '_blank', features_with_size);
}