function popwin(aPage, aTarget, w, h, extras){
	window.open(aPage, aTarget, 'width=' +w+ ',height=' +h+ ',scrollbars=' +((extras.indexOf('scroll',0)==-1)?'no':'yes')+ ',resizable=' +((extras.indexOf('resiz',0)==-1)?'no':'yes')+ ',menubar=' +((extras.indexOf('menu',0)==-1)?'no':'yes'));
}