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();
}