function openPopupWindow(theURL, height, width) {
	if (height == undefined && width == undefined){ 
		var newWind = eval("window.open('"+theURL+"','popupwin','width=550,height=500,scrollbars=yes,resizable=yes')")}
	else {
		var newWind = eval("window.open('"+theURL+"','popupwin','width="+width+",height="+height+",scrollbars=yes,resizable=yes')")}
	if (!newWind) {
		alert('Sorry, unable to open window at this time.')
		return;}
	if (!newWind.opener || newWind.opener == null) newWind.opener = window;    
	if (newWind) newWind.focus();
}