var wincount = 0;
var MuniWindowRef;

function OpenPopupWindow(url) {
	// open a new window or bring an existing one to the front
	// some browsers don't support focus() so the window has to be closed first & a new one instantiated
	var winName = "MuniWindow";
	var features = "toolbar=yes,location=no,directories=no,status=yes,menubar=yes,resizable=yes,scrollbars=auto";
		if (!eval(winName + 'Ref') || eval(winName + 'Ref').closed) {
			eval(winName + 'Ref = window.open("' + url + '","' + winName + '","' + features + '")');
	} else {
			eval(winName + 'Ref').close();
			eval(winName + 'Ref = window.open("' + url + '","' + winName + wincount + '","' + features + '")');
			wincount++;
	}
}