function close_win(){
	var nvua = navigator.userAgent;
	if(nvua.indexOf('MSIE') >= 0){
		if(nvua.indexOf('MSIE 5.0') == -1) {
		top.opener = '';
	}
}
else if(nvua.indexOf('Gecko') >= 0){
	top.name = 'CLOSE_WINDOW';
	wid = window.open('','CLOSE_WINDOW');
	}
	top.close();
}