var the_win;
function popup(url,width,height) {
	//general popup windows
	
	var qs = document.location+'';
	qs = qs.substring(qs.indexOf('?'), qs.length);
	
	if (document.images) {
		if (the_win) {
			if (!the_win.closed) {
				//the_win.focus();
				the_win.close();
			}
		}
	}
	the_win = open(url,'other', 'width=' + width + ',height=' + height + ',location=0,toolbar=0,directory=0,scrollbars=0,menubar=0,resizable=0');
}