function popupimage(filename) {
	doPopUpWindow = window.open("/popup_larger.php?file="+filename,"popupImage","scrollbars=yes,resizable=yes,left=50,top=50,screenX=50,screenY=50,width=600,height=600");
}

/*
from http://www.alistapart.com/articles/popuplinks/
*/

//var _POPUP_FEATURES = 'location=0, statusbar=0, menubar=0, width=400, height=300';
var _POPUP_FEATURES = '';

function raw_popup(url, target, 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) {
	return raw_popup(src.getAttribute('href'), src.getAttribute('target') || '_blank', features);
}

function isUndefined(v) {
	var undef;
	return v===undef;
}