var PopupWindows = new Object();

function openPopup(url, id, paramStr) {
	// Open a popup window
	// v.3.0 $1
	// by LW 
	if (!paramStr) paramStr = '';
	Popup = PopupWindows[id];
	if (!Popup) Popup='';
	
	if (!Popup.closed && Popup.location) {
		Popup.location.href = url;
	} else {
		Popup=window.open(url,id,paramStr);
		if (!Popup.opener) Popup.opener = self;
	}
	if (window.focus) {Popup.focus()}
	return false;

}